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Biology Form 4 Notes, Revision Questions and Answers

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• BIOLOGY FORM 4 REVISION QUESTIONS
• Biology Form 4 Term Exams (Term 1, Term 2, and Term 3)

Biology Form 4 Notes Topics

Genetics - form 4 biology, evolution - form 4 biology, the human eye - form 4 biology, the human ear - form 4 biology, support and movement in plants - form 4 biology, human skeleton - form 4 biology, joints and movement - form 4 biology.

Biology Form 4 Revision Questions and Answers on all topics including Genetics, Evolution, Irritability, Coordination in animals, Drugs and Drug Abuse, The Human Eye, The Human Ear, Support Human Skeleton and Joints

High School Biology Classes

Biology form 1 notes & revision questions, biology form 2 notes & revision questions, biology form 3 notes & revision questions.

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Biology Form 1 - Form 4 Revision Notes PDF (100)

Biology is taught in Kenyan schools as a science subject. Get the complete Form 1 - Form 4 biology notes based on the CBC curriculum for free on Easy Elimu to help you prepare for local and national exams.

This category contains all biology simplified notes from form 1 to form 4. It also contains topical revision questions from form 1 to form 4. Moreover, there are also all the key biology essays with answers for KCSE and MOCKS preparation. 

The Biology Form 1 to Form 4 notes in this category are obtained from the numerous high school approved text books, including KLB, and others. For the purpose of preparing for both national and local exams, it includes the complete Biology form 1 - form 4 notes based on the latest learning curriculum.

You can get these form one to form four Biology notes for  free  without having to pay a cent on our  Easy Elimu Study App , which you can get from Google Playstore  here . Also, get any of the biology notes, topical revision questions, or KCSE-MOCKS essay questions in PDF format.

As a bonus, each biology topic and subtopic has summarized notes, so you won’t have to stress over writing that  mwakenya , which makes passing that summative biology form 1 - form 4 term 3 exam easy. No matter the term—term 1, term 2, or term 3—these free biology form 1 - form 4 summary notes will get you an A.

Biology Notes FAQs

What is biology short notes?

What Is Biology?

What is biology form?

How should I make biology notes?  

Frequently Asked Questions Biology

Q: what is biology short notes.

A:   Biology short notes are biology summarizd notes such as the notes you can get here on The Easy Elimu website. Biology short notes help you revise and practice the main concepts in a topic or subtopic easily and conveniently.

Q: What Is Biology?

A: Biology is the study of life. Alternatively, you can say that Biology is the study of living organisms.

Q: What is biology form?

A: The meaning of biology form varies depending on the context the words are use.  For example, when you say biology form 1 notes that esentially means that the biology notes are for class/grade 1.

Q: How should I make biology notes?

A: Biology is a relatively easy subject to study, especially when one has good notes. 

To make good biology notes:

Go through the table of contents in your textbook..

To understand the topics you will study or make notes on first go through the table of content. If your biology teacher gives you subject guidelines, go through them thoroughly. Doing this ensures that you understand the subject objectives, the topics covered in the subject, and the assessment criteria.

Create a basic outline.

Based on the initial glance of the table of content create a basic outline of what is expected.This outline contains the main point of each topic within the subject. this ouline will act as a guide when you start writing your notes.

Read the textbook before a specific class.

This is called an initial reading. Doing this ensures you know what will be taught in the biology class before the lesson begins.

Listen to your teacher.

In class, listen to the teacher/professor and let them clarify any points that you did not get during your initial reading. Remember to listen to the lecture. Do not write extensive notes at this point. Only write shorthand notes that you can expand on later.

Conduct a follow-through read of your textbook.

Highlight the main points in your textbook, so they will be easy to refer to. Remember, do not simply highlight everything but only the most significant things.

At this point, you can start writing more comprehensive notes.

• Ensure that your notes are organized and neat.
• Write a title head and the main points below the title head in bullet points.
• Ensure you leave no questions unanswered while writing notes that do not miss points.
• For diagrams and experiments, ensure that everything is neatly labeled for easy identification and referral.

As you write your notes, ensure that they are accurate. Noting down wrong facts ensures that you get wrong answers pertaining to that concept when it is time for an assessment.

Remember, you will use your notes as a reference point when taking your biology exams. Biology form 1, biology form 2, biology form 3, or biology form 4 exams.

Review and update your notes

Review and update your notes continuously as you learn new facts and get new topical information. This ensures that all your bases are covered so that you will pass that biology KCSE exam.

Download the Easy Elimu study app now

Biology Notes Form 1 (5)

For the preparation of national and local exams, get the entire biology Form 1 syllabus for free . These biology form 1 notes are aggregated from the various high school approved text books, including KLB biology form 1, Finder biology form 1, etc. The biology notes cover various topics, as shown below.  

The form 1 biological concepts that you can learn using our notes include;

• An Introduction to Biology  
• Classification 1
• Cell Physiology
• Nutrition in plants and animals  

You can get the notes for free without having to pay a cent on our Easy Elimu Study App , which you can get from the Google Playstore here. 

As a bonus, each topic has summarized notes, so you won’t have to stress over writing that mwakenya , which makes passing that summative biology form 1 term 3 exam easy. Whether it’s term 1, 2 or 3, these free biology form 1 summary notes will give you that grade A. 

How to optimally use this page:

• For easy navigation, instead of scrolling down, you can click on the links above to go to the specific topic within the page that you want to check out.
• To download a specific chapter in PDF format, click on any of the chapter headings (below) and you will be redirected to another window where you can download the biology topical notes in PDF format.

Chapter 1: Summarized notes on introduction to biology

This topic covers various subtopics including:

• Definition of Biology - What is Biology? 
• Branches of Biology 
• Importance of biology 
• Nutrition 
• Respiration 
• Gaseous Exchange 
• Excretion 
• Growth and Development 
• Reproduction 
• Irritability 
• Movement 
• Sweep net 
• Fish net 
• Pooter 
• Bait trap 
• Pit fall trap 
• Pair of forceps 
• Specimen bottles 
• Magnifying lens 
• Precautions During Collection and Observation of Specimen 
• Comparison Between Plants and Animals 

Chapter 2: Summarized notes on classification 1

This topic covers various subtopics including;

• Introduction 
• External features of plants used in classification 
• External features of animals used in classification 
• Importance of Classification 
• Historical background of Classification 
• Taxonomic Units of Classification 
• Scientific Naming of Living Organisms 
• Origin of Scientific Names 

Chapter 3: Summarized notes on the cell

• Parts of a Microscope 
• Handling and Care of the Microscope 
• How to use the Microscope 
• Cell Structure under Light Microscope 
• The Cell as seen under the Electron Microscope 
• Structure and Functions of the Cell Organelles 
• Comparison between Plant Cells and Animal Cells 
• Tissues 
• Organs 
• Organ System 

Chapter 4: Summarized notes on cell physiology

• Structure of the Membrane 
• Properties of the cell membrane 
• Physiological Processes of the Cell membrane 
• Demonstration of the Process of Diffusion using Potassium Manganate (VII) 
• The Role of Diffusion in Living Organisms 
• Factors Affecting the Rate of Diffusion 
• Demonstration of Osmosis Using a Visking Tubing 
• Explanation of Osmosis, Osmotic Pressure & Osmotic Potential 
• Water Relations in Animals 
• Water Relations in Plants 
• Role of Osmosis in Organisms 
• Factors Affecting the Rate of Osmosis 
• Role of active transport in living organisms 
• Factors affecting the rate of Active Transport 

Chapter 5: Summarized notes on nutrition in plants and animals

• Modes of Nutrition 
• Importance of Photosynthesis 
• External Leaf Structure 
• Internal Leaf Structure 
• Adaptations of the Leaf to Photosynthesis 
• Raw Materials for Photosynthesis 
• Conditions for Photosynthesis 
• Photosynthesis Process 
• Testing for Starch in a Leaf 
• Factors Affecting the Rate of Photosynthesis 
• Experiment to Investigate the Gas Produced During Photosynthesis 
• Experiments on Factors Necessary for Photosynthesis 
• Carbohydrates 
• Lipids 
• Proteins 
• Enzymes 
• Modes of Heterotrophism 
• Dentition 
• Classes of Holozoic Heterotrophs 
• Dental Formula 
• Dental Diseases
• Dental Hygiene
• Digestion in the Mouth
• Digestion in the Stomach
• Digestion in the Ileum
• Assimilation
• Importance of Vitamins, Mineral Salts, Roughage and Water in Human Nutrition
• Factors affecting energy requirements in humans

KCSE-MOCKS Biology essays Questions and Answers (66)

For the preparation of national and local exams, get all biology essays with answers here . These biology essay questions are aggregated from all the KCSE examinations. Unique essay questions are also from Form 4 Mock past papers. The biology essays cover all topics from form 1 to form 4.

This category contains all biology essay questions with answers to help with your high school exam revision. Study the most commonly asked biology essays in preparation for KCSE or MOCK examinations.

You can get access to the notes for free without having to pay a cent on the  EasyElimu Study App , which you can get from the Google Playstore here .

As a bonus, each KCSE-MOCKS biology essay question is fully answered. The answers are summarized but fully explained, so you won’t have to stress over writing that mwakenya, which makes passing that biology exam easy. Whether it’s form 1, 2, 3, or 4, term 1, 2, or 3, these free biology essay questions and answers pdf will give you that grade A.

Visit the EasyElimu App to get the answers to the KCSE-MOCKS Biology essays questions for free. Alternatively, click the blue links at the end  of this page to download, in PDF format, the specific KCSE-MOCKS Biology essays questions with answers

All the Key Biology Essay Questions

• Explain the various ways in which a typical cell is adapted to its functions-KCSE Biology Essays
• Explain how the various specialized cells are modified to carry out their functions in plants and animals - KCSE biology essays
• Describe how the mammalian body protects itself against infections -KCSE biology essays
• How are the leaves of higher plants adapted to their functions? - KCSE biology essays
• Explain how the various teeth adapt mammals for nutrition - KCSE biology essays
• Describe the process of urine formation in the mammalian kidneys - KCSE Biology Essays
• Explain the role of the following hormones during homeostasis - KCSE Biology Essays
• Distinguish between Diabetes mellitus and Diabetes insipidus - KCSE Biology Essays
• Explain how the various abiotic factors may affect plants - KCSE Biology Essays
• Discuss the causes, effects and control measures for water pollution - KCSE Biology Essays
• How are xerophytes and hydrophytes adapted to their habitats? - KCSE Biology Essays
• Outline the differences between wind and insect pollinated flowers - KCSE Biology Essays
• Describe what happens in a flower from the time of pollination up to the time of seed and fruit development - KCSE Biology Essays
• Discuss the adaptations of the female reproductive system of humans - KCSE Biology Essays
• Describe the process of gaseous exchange in terrestrial plants - KCSE Biology Essays
• How is the mammalian gaseous exchange system adapted to its functions? - KCSE Biology Essays
• Describe the structure and function of the mammalian skin - KCSE Biology Essays
• Luteinising Hormone (LH)
• Follicle Stimulating Hormone (FSH)
• Progesterone
• What is secondary growth?
• Describe the process of secondary thickening in a woody stem
•  Explain how the following blood cells are adapted to their functions - KCSE Biology Essays
• Discuss Lamarck’s and Darwin’s theories of evolution - KCSE Biology Essays
• What is natural selection?
• Discuss three examples of natural selection in action
• Discuss the various mechanisms of opening and closing of stomata - KCSE Biology Essays

Describe the process of mitosis - KCSE Biology Essays

Describe the adaptations of schistosoma spp to their parasitic mode of life - kcse biology essays, what is meant by the term symbiosis - kcse biology essays.

• Describe five types of symbiotic relationships in a natural ecosystem - KCSE Biology Essays

Discuss the various ways employed by preys to avoid the predators - KCSE Biology Essays

• Describe the nitrogen cycle - KCSE Biology Essays
• Describe how the various supportive tissues in plants adapt them to their habitats - KCSE Biology Essays
• Why is locomotion necessary in higher animals? - KCSE Biology Essays

What is digestion? - KCSE Biology Essays

• What is the importance of a balance diet in human nutrition? - KCSE Biology Essays

Explain how the process of evolution may result to the formation of a new species - KCSE Biology Essays

Discuss the role of the various hormones in plant growth and development - kcse biology essays, how is the mammalian eye adapted to its functions kcse biology essays, what is transpiration - kcse biology essays.

• Explain how the various environmental factors affect the rate of transpiration - KCSE Biology Essays

Distinguish between mutations, mutants and mutagens - KCSE Biology Essays

How are seeds and fruits of plants adapted to their mode of dispersal - kcse biology essays, discuss the composition and functions of mammalian blood - kcse biology essays, describe the adaptations of the nervous system to its functions - kcse biology essays, state the economic importance of members of monera and fungi and for each economic importance name a suitable or appropriate organism - kcse biology essays, discuss the structure and functions of the various muscle tissues found in humans - kcse biology essays, discuss the adaptations of the male reproductive system of humans - kcse biology essays, explain the factors that affect enzyme activity - kcse biology essays.

• Carbon (IV) Oxide
• Chlorophyll
• Suitable temperature and pH
• Describe the route taken by water from the soil up to the evaporating surface of a plant - KCSE Biology Essays
• How is the mammalian heart adapted to its functions? - KCSE Biology Essays
• What is a reflex action?
• Outline the activities that occur in the body when one touches a hot object
• Discuss the various ways in which anaerobic respiration is utilized in industries and homes - KCSE Biology Essays

To download a specific chapter in PDF format, click on the question heading (below) and you will be redirected to another window where you can download the biology KCSE Essay question with answers in PDF format.

Alternatively, you can copy and paste the specific questions you want to search for on the search bar at the top of the page and you will be redirected to the question you want.

Good Luck and happy reading :)

Biology Notes Form 2 (4)

For the preparation of national and local exams, get the entire biology Form 2 syllabus for free. These biology form 2 notes are aggregated from the various high school approved text books, including KLB biology form 2, Finder biology form 2, etc. The biology notes cover various topics, as shown below.   The form 2 biological concepts that you can learn using our notes include;  

• Transport in plants and animals.
• Respiration.
• Gaseous exchange.
• Excretion and homeostasis.

You can get the notes for free without having to pay a cent on our Easy Elimu Study App, which you can get from the Google Playstore here.  

As a bonus, each topic has summarized notes, so you won’t have to stress over writing that mwa ken ya , which makes passing that biology form 2 term 3 exam easy. Whether it’s term 1, 2 or 3, these free biology form 2 summary notes will give you that grade A

• To download a specific chapter in PDF format, click on the chapter heading (below) and you will be redirected to another window where you can download the biology topical notes in PDF format.

Chapter 1: Summarized notes on transport in plants and animals

• Internal Structure of Roots and Root Hairs 
• Internal structure of a Root Hair Cell 
• The Stem 
• Absorption of Water and Mineral Salts 
• Structure and Function of Xylem 
• Forces Involved in Transportation of Water and Mineral Salts 
• Importance of Transpiration 
• Factors Affecting Transpiration 
• Phloem 
• The Circulatory System 
• Transport in Insects 
• Structure and Function of the Heart 
• Pumping Mechanism of the Heart 
• Structure and Function of Arteries, Capillaries and Veins 
• Diseases and Defects of Circulatory System 
• Composition of Blood 
• ABO Blood Groups 
• Blood Transfusion 
• Lymphatic System 
• Types of Immunity 
• Importance of Vaccination 
• Allergic Reactions 

Chapter 2: Summarized notes on respiration.

• Meaning and Significance of Respiration
• Mitochondrion Structure and Function
• Aerobic Respiration
• Anaerobic Respiration
• Practical Activities
• Comparison Between Aerobic and Anaerobic Respiration
• Comparison Between Energy Output in Aerobic and Anaerobic Respiration
• Substrates for Respiration
• Application of Anaerobic Respiration in Industry and at Home

Chapter 3: Summarized notes on gaseous exchange.

• Necessity for Gaseous Exchange in Living Organisms
• Structure of Guard Cells
• Mechanism of Opening and Closing of Stomata
• Process of Gaseous Exchange in Root, Stem and Leaves of Aquatic and Terrestrial Plants
• Gaseous Exchange Through Stems
• Gaseous Exchange in Roots
• Types and Characteristics of Respiratory Surfaces
• Characteristics of Respiratory Surfaces
• Gaseous Exchange in Amoeba
• Gaseous Exchange in Insects
• Gaseous Exchange in Bony Fish (e.g, Tilapia)
• Gaseous Exchange in Amphibians - Frog
• Gaseous Exchange in a Mammal -Human
• Dissection of a Small Mammal (Rabbit) to Show Respiratory Organs
• Diseases of the Respiratory System

Chapter 4: Summarized notes on excretion and homeostasis.

• Homeostasis
• Plant Excretory Products their Source and Uses
• Excretory Products in Animals
• Excretion and Homeostasis in Unicellular Organisms
• Structure and Function of the Human Skin
• Structure and Functions of the Kidneys
• Common Kidney Diseases
• Role of Liver in Excretion
• Common Liver Diseases
• Neuro-Endocrine System and Homeostasis
• The Skin and Temperature Regulation
• Homeostatic Control of Body Temperature in Humans
• Behavioural and Physiological Responses to Temperature Changes
• The Skin and Osmoregulation
• The Kidney and Osmoregulation

After you are done reading the summarized notes, you can test yourself with our biology form 2 questions and answers, which you can access here.

Moreover, if you are having a problem with a specific topic or want to practice more, you can practice with our biology Form 2 topical questions and answers, which you can access here.

Biology Notes Form 3 (4)

For the preparation of national and local exams, get the entire biology Form 3 syllabus for free . These biology form 3 notes are aggregated from the various high school approved text books, including KLB biology form 3, Finder biology form 3, etc. The biology notes cover various topics, as shown below.  

The form 3 biological concepts that you can learn using our notes include; 

• Classification 2
• Reproduction in plants and animals
• Growth and development

You can get the notes for free without having to pay a cent on our Easy Elimu Study App , which you can get from the Google Playstore here. 

As a bonus, each topic has summarized notes, so you won’t have to stress over writing that  mwakenya , which makes passing that biology form 3 term 3 exam easy. Whether it’s term 1, 2 or 3, these free biology form 3 summary notes will give you that grade A.

How to optimally use this page: 

• For easy navigation, instead of scrolling down, you can click on the links above to go to the specific topic within the page that you want to check out. 

Chapter 1: Summarized notes on classification 2

• General Principles of Classification
• Binomial Nomenclature
• Kingdom Monera
• Kingdom Protoctista
• Kingdom Fungi
• Division Bryophyta
• Division Pteridophyta
• Division Spermatophyta
• Phylum Arthropoda
• Phylum Chordata
• Rules Used to Construct a Dichotomous Key
• Some Common Features Used for Identification
• To Examine Bryophyta
• To Examine Pteridophyta
• To Examine Spermatophyta
• Examination of Arthropoda
• Examination of Chordata

Chapter 2: Summarized notes on ecology

• Introduction
• The Ecosystem
• Carrying Capacity
• Abiotic Factors (Environmental Factors)
• Biotic Factors
• Competition
• Saprophytism
• Nitrogen Cycle
• Food Chains
• Decomposers
• Pyramid of Numbers
• Pyramid of Biomass
• Quadrat Method
• Line Transect
• Belt Transect
• Capture-recapture Method
• Hydrophytes (Water Plants)
• Halophytes (Salt Plants)
• Effects and Control of causes of Pollutants in Air, Water and Soil
• Bacterial Diseases
• Protozoa Diseases
• Parasitic Diseases 
• Adaptions to Habitat
• Comparison of Root Nodules from Fertile and Poor Soils - Root Nodules
• Estimation of Population using Sampling Methods

Chapter 3: Summarized notes on reproduction in plants and animals

• Asexual Reproduction
• Types of Asexual Reproduction.
• Structure of a Flower
• Pollination
• Fertilisation in Plants
• Fruit Formation
• Placentation
• Methods of Fruit and Seed Dispersal
• Reproduction in Humans
• Fertilisation in Animals
• Implantation
• Role of Placenta
• Gestation Period
• Reproductive Hormones
• Secondary Sexual Characteristics
• Menstrual Cycle
• Sexually Transmitted Infections (STl)
• Advantages of Asexual Reproduction
• Disadvantages of Asexual Reproduction
• Advantages of Sexual Reproduction
• Disadvantages of Sexual Reproduction

Chapter 4: Summarized notes on growth and development

• Concept of Growth and Development
• Lag Phase (slow growth)
• Exponential Phase (log phase)
• Decelerating Phase
• Plateau Phase
• Structure of the Seed
• Dormancy in Seeds
• Seed Germination
• Primary and Secondary Growth
• Role of Growth Hormones in Plants
• Apical Dominance
• Growth and Development in Animals
• Role of Hormones in Insect Metamorphosis

After you are done reading the summarized notes, you can test yourself with our biology form 3 questions and answers, which you can access here.

Moreover, if you are having a problem with a specific topic or want to practice more, you can practice with our biology Form 3 topical questions and answers, which you can access here.

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Biology Form 1 Topical Revision Questions and Answers (5)

For the preparation of national and local exams, get biology form 1 topical revision questions with answers for  free .

These biology topical revision questions are aggregated from the various high school KICD approved textbooks, including KLB biology form 1, Finder biology form 1, Mentors biology form 1, Spotlight biology form 1, Moran biology form 1, Pearsons biology form 1, etc.

The biology topical revision questions with answers cover various topics, as shown below.

The form 1 biological concepts that you can revise with these topical revision questions include;

• An Introduction to Biology
• Nutrition in plants and animals 

You can get the topical revision questions for free without having to pay a cent on our  EasyElimu Study App , which you can get from the Google Playstore  here .

As a bonus, if you need to refresh your knowledge on a topic, EasyElimu has summarized notes, so you won’t have to stress over looking for notes , which makes passing that summative biology form 1 term 3 exam easy.

Whether it’s term 1, 2 or 3, these free biology form 1 revision topical questions will give you that grade A.

Visit the EasyElimu App to get the answers to the topical revision questions for free.

Alternatively, click the blue download notes button on this page to download in PDF format the specific topical revision questions with answers

Questions per topic

Introduction to biology questions and answers - form 1 biology topical revision.

• Write three major differences between plants and animals.
• List the uses of the energy obtained from the process of respiration.
• State three characteristic similar in plants and animals.
• Motor vehicles move, use energy and produce carbon dioxide and water. Similar characteristics occur in living organisms yet motor vehicles are not classified as living. List other characteristics of living things that do NOT occur in motor vehicles.

Classification 1 Questions and Answers - Form 1 Biology Topical Revision

• What is meant by the term binomial nomenclature? (1 mk)
• Give two reasons why classification is important. (2 mks)
• Classification
• Binomial nomenclature.
• Ascaris lumbricoides is an example of an endoparasite. The name Ascaris refers to
• Black jack ( Bidens pilosa) belong to the family compositae. What does pilosa stand for? (1 mk)
• Define the term species. (1mk)
• Distinguish between Taxonomy and taxon. (1mk)
• Give two characteristics that distinguish scientific names of organisms from the ordinary names  
• Name the branch of Biology that deals with the study of animals
• Write the name correctly
• Identify the genus and species names 

The Cell Questions and Answers - Form 1 Biology Topical Revision

• Skeletal muscle cell 
• Palisade cell
• Protein synthesis
• Transport cell secretions

• Name the parts labeled x and y
• Suggest why the structures labeled x would be more on one side than the other side.
• State the function of cristae in mitochondria (1mk)

• Name the part labeled Y (1mk)
• State the function of the part labeled X (2 mks)
• What is the formula for calculating linear magnification of a specimen when using a hand lens? (1mk)
• Give a reason why staining is necessary when preparing specimens for observation under the microscope. (1mk)
• State three functions of Golgi apparatus. (3mks)
• Name two structures found in plant cell but are absent in animals cell.
• Root hair cell
• Red blood cell
• The diameter field of view of a light microscopic is 3.5mm. Plant cells lying of the diameter are 10. Determine the size of one cell microns (1mm = 1000μm)
• Organ system
• Digestion and destruction of worn out organelles.
• Osmoregulation
• Use of a sharp cutting blade

• Plasma membrane
• What is the of nucleus of a cell made up of?
• In a laboratory exercise a student observing a drop of pond water under a microscope saw and drew a spirogyra. If the magnification of the eye-piece was x5 and that of the objective lens was x100, what was the magnification of the spirogyra?
• If the spirogyra has a length of 5cm at the above magnification, calculate the actual length in micrometers

• How is the organelle you have identified in (a) above suited to its function
• Synthesize ribosomes
• Regulate exchange of substances in and out of the nucleus
• State the roles of enzyme catalase in living cells
• Which factor inactivates enzyme?

• Identify the cell organelle
• What is the function of the part labelled A
• Osmoregulation in amoeba
• Carries out digestion and destruction of worn out cell organelles
• State three properties of the cell membrane

• Name a carbohydrate which forms part of the structure labelled S
• State two functions of the part labelled R
• Name two structures present in the diagram but absent in the animal cell
• Biochemistry

• Chloroplasts
• What is the formula for calculating linear magnification of a specimen when using a hand lens
• Centrioles ;
• Cell membrane
• Name parts labelled X and Y
• Suggest why the structures labelled X would be more on one side than the other
• During a practical class, form fours estimated the field of view to be 3.5mm. Using the low power objective, they observed spirogyra cells across the same field of view and counted 8cells. Calculate the size of each cell and give your answer in micrometer.
• Magnification and resolution of a microscope
• Mounting and staining of a specimen
• Transport of packaged glycoproteins
• Destruction of worn out cell organelles
• Synthesis of proteins
• Making of thin sections
• Using a sharp blade to make the sections
• Eye piece lens
• Given that the diameter of the field of view of a light microscope is 2000um. Calculate the size of a cell in mm if 10 cells occupy the diameter of the field of view
• A cell was found to have the following under a light microscope; cell membrane, irregular in shape, and small vacuoles. Identify the type of the cell above
• Golgi apparatus
• The eye piece lens
• The objective lens

• Identify the organelle
• State the function of the organelle
• What is the importance of infoldings in the inner membrane.
• Give two examples of tissues where you would expect many such organelles in animal body.

Cell Physiology Questions and Answers - Form 1 Biology Topical Revision

• Sodium ions
• Potassium ions
• For each processes named in (a) (i) and (ii) above, state one condition necessary for the process to take place. (2mks)
• Explain how water in the soil enters the root hairs of a plant. (4mks)
• Explain how drooping of leaves on a hot sunny day is advantageous to a plant. (2mks)
• What is diffusion? (2mks)
• Diffusion gradient (1mk)
• Surface area to volume ratio (1mk)
• Temperature (1mk)
• Outline 3 roles of active transport in the human body (2mks)
• State the importance of osmosis in plants (3mks)

• State the expected results. (1mk)
• Explain your answer in (a) above. (3mks)
• Explain why plant cells do not burst when immersed in distilled water. (2mks)
• Distinguish between diffusion and osmosis. (2mks)
• Isotonic solution
• Hypotonic solution
• Hypertonic solution (3mks)
• Addition of large amounts of salt to soil in which plants are growing kills the plants. Explain. (6mks)
• Red blood cells burst when placed in distilled water while plant cells remain intact.
• Fresh water protozoa like amoeba do not burst when placed in distilled water. (2mks)
• What change was expected in strip A and B
• Account for the change in strip A

• State the expected result at the end of one hour
• Explain the observations made in this experiment
• Strong salt solution 
• Distilled water
• State three physiological processes that are involved in movement of substances across the cell membrane

• Calculate the average mass of a potato cylinders after reweighing. Show your working.
• Explain why mass of the cylinders had increased.

• Account for the shape of the cell at the end of the experiment.
• Draw a diagram to illustrate how a plant cell would appear if subjected to the same treatment.

• What name is given to the process that occurs when the cell is placed in solution Y ?
• Describe the process that would occur in a plant cell when placed in a similar solution as that of solution X

• What is the name given to the process that occurs when the cell is put into solution B ?
• Compare the results obtained when the cell is put in solution B to the results that would be obtained if a plant cell was put in the same solution.

• Account for the results in the set-up
• the number of red blood cells
• the appearance of red blood cells if viewed under the microscope
• Cells being turgid
• Cells being thickened by cellulose
• Cells being thickened by lignin

• Suggest the nature of solutions X and Y .
• Name the process A and B .
• What would happen to normal blood cell if it were placed in a isotonic solution.
• Name two plant processes in which diffusion plays an important role.
• Sucrose solution
• What would be the result in terms of length if a boiled potato was used?
• Explain your answer in (b)(i)  above.
• State two uses of the physiological process being demonstrated in the experiment

• Name the structure labelled A .
• State the function of structure B.
• If eight of cell I were observed across the diameter of the filed of view of 0.5 mm, Work out the actual diameters of each cell in micrometers.
• Suggest the identity of the solution Q.
• Account for the change in cell I above.
• State any one importance of the physiological process being demonstrated above in animals. 

Nutrition in Plants and Animals Questions and Answers - Form 1 Biology Topical Revision

• Suggest the identity of substances K and L. (2mks) K ________________________ L ________________________
• Other than temperature state three ways by which the rate of reaction  could be increased. (3mks)
• Explain how substance L slowed down the reaction. (1mk)
• State the role of light in the process of photosynthesis. (2mks) Name one product of dark reaction in Photosynthesis (1mk)
• State one effect of magnesium deficiency in green plants.

• A and B (3mks)
• B and C (2mks)
• How can the rate of reaction be increased after point B? (1mk)
• State two factors that affect the rate of enzyme reaction. (2mks)
• State the function of co-factors in cell metabolism. (1 mk)
• Give one example of a metallic co-factor. (1 mk)
• Name two mineral elements that are necessary in the synthesis of chlorophyll.  (2mks)
• What is the role of the vascular bundles in plants nutrition? (3mks)
• Describe what happens during the light stage of photosynthesis. (3mks)
• Light stage occurs
• Dark stage occurs (2mks)
• How is dark stage dependant on the light stage of photosynthesis? (2mks)
• Why was the solution boiled with hydrochloric acid? (1mk)
• To which class of carbohydrates does sugarcane belong?
• Simple sugars combine to form complex sugar. (1mk)
• A complex sugar is broken into simple sugar. (1mk)
• Animals (2mks)
• Name structural units of lipids (1mk)
• State three important functions of lipids in living organisms. (3mks)

• What would be the colours of the regions of the leaf marked L. M and N?  (3mks)
• What is the function of the sodium hydroxide pellets? (1mk)
• Name the bacteria found in the root nodules of leguminous plant.  (1mk)
• State the association of the bacteria named in a) above with the  leguminous plants. (1mk)
• State the function of co-factors in cell metabolism.
• Give one example of metallic co-factor.
• Name the disease in humans that is cause by lack of vitamin C. (1mk)
• Vitamin D (1mk)
• Iodine (1mk)
• Explain how birds of prey are adapted to obtaining their food. (2mks)
• Refrigeration
• Canning (3mks)
• State one similarity and one difference between parasitic and predatory  modes of feeding (3mks)
• In an investigation, the pancreatic duct of a mammal was blocked. It was  found that the blood sugar regulation remained normal while food  digestion was impaired. Explain these observations. (3mks)
• Give a reason why lack of roughage in diet often leads to constipation.
• What does the term digestion mean? (2mks)
• Describe how the mammalian small intestine is adapted to its  function. (18mks)
• State the role of vitamin C in humans. (2mks)
• Distinguish between the terms homodont and heterodont. (1mk)
• What is the function of carnasial teeth? (1mk)
• A certain animal has no incisors, no canines, 6 premolars and 6  molars in its upper jaw, in the lower jaw there are 6 incisors, 2  canines, 6 premolars and 6 molars. Write its dental formula.
• State two functions of bile juice in the digestion of food.  (2mks)
• How does substrate concentration affects the rate of  enzyme action? (1mk)
• Name the end-products of the light stage in photosynthesis. (2mks)

• Name the type of tooth shown.
• Give a reason for your answer in (a) (i) above. (1mk)
• State a factor that denatures enzymes. (1mk)
• Name a fat soluble vitamin manufactured by the human body.  (1mk)
• State two functions of potassium ions in the human body.  (2mks)
• The action of ptyalin stops at the stomach. Explain. (1mk)
• Name the features that increase the surface area of small intestines.  (2mks)
• Salivary glands
• Liver (3mks)
• State any three functions of the mucus, which is secreted along the wall of the  alimentary canal. (3mks)
• Explain why the digestion of starch stops after food enters the stomach. (3mks)
• Give an account of the adaptation of a named herbivore to its mode of feeding.  (3mks)
• What are the contents of gastric juice and what is their role in digestion. (6mks)
• Liver damage leads to impaired digestion of fats . Explain the  statement. (3mks)

Biology Notes Form 4 (4)

For the preparation of national and local exams, get the entire biology Form 4 syllabus for free . These biology form 4 notes are aggregated from the various high school approved text books, including KLB biology form 4, Finder biology form 4, etc. The biology notes cover various topics, as shown below.

The form 4 biological concepts that you can learn using our notes include;

• Reception, Response and Co-ordination in Plants and Animals
• Support and Movement in Plants and Animals

You can get the notes for free without having to pay a cent on our EasyElimu Study App , which you can get from the Google Playstore here.

As a bonus, each topic has summarized notes, so you won’t have to stress over writing that mwakenya, which makes passing that summative biology form 4 term 3 exam easy. Whether it’s term 1, 2 or 3, these free biology form 4 summary notes will give you that grade A.

Chapter 1: Summarized notes on genetics

• Continous and Discontinous Variation
• Number of Chromosomes
• Chromosome Structure
• Properties of Chromosomes
• Structure of DNA
• Components of DNA
• Monohybrid Inheritance
• Mendel's Procedure
• Terms used in Genetics
• Use of Symbols
• Test Cross or Back Cross
• Complete Dominance
• Incomplete Dominance
• Inheritance of ABO blood groups in humans
• The ABO Blood group System
• Sex Determination in Humans
• Types of Mutations
• Causes and Consequences of Chromosomal Mutations
• Gene Mutations
• Genetically Inherited Disorders in Humans
• Practical Applications of Genetics
• To demonstrate Contionous variations - Height of Students
• Discontinous Variations - Ability to Roll Tongue
• Demonstration of Mitosis and Meiosis

Chapter 2: Summarized notes on evolution

• Meaning of Evolution and Current Concepts
• Special Creation
• Chemical Evolution
• Evidence of Organic Evolution
• Lamark's theory
• Evolution by Natural Selection
• Comparison of Vertebrate Limbs
• Comparison of wings of bird and insect
• Education Tour to Archeological Site/Local Museum

Chapter 3: Summarized notes on reception, response and co-ordination in plants and animals

• Irritability
• Co-ordination
• Tactic Movement in Plants and Other Organisms
• Nastic Movements
• Production of Auxins and their Effects on Plant Growth
• The Nervous System
• Simple And Conditioned Reflex Actions
• The Role of Endocrine System in Human Beings
• Comparison between Endocrine and Nervous System
• Structure and Function of Parts of the Human Eye
• Structure and Functions of Parts of the Human Ear
• To Investigate Tactic Responses
• To Investigate Tropisms in Plants
• Experiment to Determine Distance of the Blind Spot
• The Knee Jerk Experiment

Chapter 4: Summarized notes on support and movement in plants and animals

• Necessity for Movement and Support in Plants
• Role of Support Tissues in Young and Old Plant
• Necessity for Support and Movement in Animals.
• Types and Functions of Skeletons
• Mammalian Skeleton
• To Observe Prepared Slides of Transverse Section of Stems of Herbaceous and Woody Plants
• To Observe Wilting in Young Herbaceous Plants.
• To Examine the Exoskeleton in an Arthropod.
• To Observe the External Features of a Finned Fish.
• To Examine Bones of the Axial Skeleton of a Rabbit.
• To Observe Bones of Appendicular Skeleton.

After you are done reading the summarized notes, you can test yourself with our biology form 4 questions and answers, which you can access here.

Moreover, if you are having a problem with a specific topic or want to practice more, you can practice with our biology Form 4 topical revision questions and answers, which you can access here.

Biology Form 2 Topical Revision Questions and Answers (4)

For the preparation of national and local exams, get biology form 2 topical revision questions with answers for  free .

These biology topical revision questions are aggregated from the various high school KICD approved textbooks, including KLB biology form 2, Finder biology form 2, Mentors biology form 2, Spotlight biology form 2, Moran biology form 2, Pearsons biology form 2, etc.

The form 2  biological concepts that you can revise with these topical revision questions include;

You can get the topical revision questions for free without having to pay a cent on our  Easy Elimu Study App , which you can get from the Google Playstore  here .

As a bonus, if you need to refresh your knowledge on a topic, EasyElimu has summarized notes, so you won’t have to stress over looking for notes , which makes passing that summative biology form 2 term 3 exam easy.

Whether it’s term 1, 2 or 3, these free biology form 2 revision topical questions will give you that grade A.

Alternatively, click the blue download button on this page to download, in PDF format, the specific topical revision questions with answers

1. Transport in Plants and Animals Questions and Answers - Biology Form 2 Topical Revision

Transport in plants - questions.

• What was the aim of this experiment? (1mk)
• Explain the results which would be expected in each of the two  experiments conditions. (3mks)
• Explain how drooping of leaves on a hot sunny day is advantageous to  plant. (2mks)
• Explain how environmental factors affect the rate of transpiration in  flowering plants. (20mks)

• Name the parts labeled A and B (2mks) A___________________ B____________________
• State the functions of the parts labeled C, D and E C________________ D_______________ E_______________
• List three differences between the section shown above and one  that would be obtained from the root of the same plant (3mks)

• Name the structures labeled K and L K_______________ L_______________ (2mks)
• Explain how water from the soil reaches the structure labeled L.  (5mks)
• Name the process by which mineral salts enter into the plant.  (1mk)
• State two ways in which xylem are adapted to their function. (2mks)
• What makes young herbaceous plant remain upright? (2mks)

• Name the structures labeled R and S and a cell labeled T. R ___________________ S ___________________ Cell T ___________________ (3mks)
• State the function of the structure labeled S. (1mk)
• Explain why xylem is a mechanical tissue (2mks)
• Material that strengthens xylem tissue. (1mk)
• Tissue that is removed when the bark of a dicotyledonous plant is  ringed. (1mk)
• How are xylem vessels adapted for support? (1mk)
• What is the role of vascular bundles in plant nutrition? (3mks)
• Name two tissues which are thickened with lignin. (2mks)
• How is support attained in herbaceous plant? (1mk)

• From which plant organ was the section obtained? (1mk)
• Give two reasons for your answer in (a) above. (2mks)
• Name the parts labeled J, K and L (3mks) J__________________________________ K_________________________________ L_________________________________
• State two functions of the part labeled M. (2mks)
• Describe how water moves from the soil to the leaves in a tree. (20mks)
• State two ways in which the root hairs are adapted to their function.  (2mks)

• Using the same axes, plot a graph of the amount of sugar against time  (6mks)
• Ringed stem (1mk)
• Normal stem (1mk)
• How much sugar would be in the rigged stem if it was measured at 03 45 hours. (2mks)
• Give reasons why there was sugar in the stems of both trees at 06 45  hours. (2mks)
• 0645 hours and 1545 hours (3mks)
• 1545 hours and 0045 hours (2mks)
• Other than sugars name two compounds that are translocated in  phloem. (2mks)
• Explain why plants shed off their leaves. (2mks)
• What is the importance of transpiration to plants?
• Give adaptive features which enable a plant to reduce the loss of  water.

Transport in Animals - Questions

• People can die when they inhale gases from burning charcoal in poorly  ventilated rooms. What compound is formed in the human body that leads to such deaths? (1mk)
• Explain why blood from a donor whose blood group is A cannot be  transfused into a recipient whose blood group is B. (2mks)
• State one difference between closed and open circulatory systems. (1mk)
• Open circulatory system
• Closed circulatory system (2mks)
• What are the advantages of the closed circulatory system over the  open circulatory system? (5mks)
• Explain two ways in which mammalian erythrocytes (red blood cells) are  adapted to their function (2mks)
• Name the blood vessels that link arterioles with venules.  (1mk)
• Explain four ways in which the vessels you named in (a)  above are suited to carrying out their functions. (4mks)
• State two ways in which the composition of blood in the  pulmonary arterioles differ from that in the pulmonary venules.  (2mks)
• Why would carboxyhaemoglobin lead to death? (2mks)
• Explain how the red blood cells of mammals are adapted for efficient  transport of oxygen. (2mks)

• The blood cells represented by X
• Metal ion represented by Y
• The end product of the mechanism represented Z
• How can excess bleeding result in death? (2mks)
• Name the process by which the human body naturally stops  bleeding. (1mk)
• How can low blood volume be brought back to normal? (2mks)
• Name one defect of the circulatory system in humans. (1mk)
• State three functions of blood other than transport. (3mks)
• What prevents blood in veins from flowing backwards? (1mk)
• State two ways in which the red blood cells are adapted to their  function. (2mks)
• State one way by which HIV/AIDS is transmitted from mother to child.  (1mk)
• Explain how the various components of blood are adapted for their  function. (20mks)
• Distinguish between blood, plasma, serum, tissue fluid and lymph.  (10mks)
• A patient whose blood group is A died shortly after receiving  blood from a person of blood group B. Explain the possible cause  of death of the patient. (2mks)
• Name the blood groups of the possible donors (2mks)
• Give reasons for your answer in (i) above. (2mks)
• Differentiate between active immunity and passive immunity. (2mks)
• Explain why a person can catch a cold several times in a year but only  catches measles once in his or her lifetime. (2mks)
• Most carbon dioxide is transported from tissues to the lungs within the red  blood cells and not in the blood plasma. Give two advantages of this mode  of transport. (2mks)
• What is the importance of tissue fluid? (2mks)

2. Respiration Questions and Answers - Biology Form 2 Topical Revision

• Why was the glucose solution boiled before adding the yeast  suspension? (1mk)
• What was the importance of cooling the glucose solution before  adding the yeast suspension? (1mk)
• What was the use of the oil in the experiment? (1mk)
• What observation would be made in test tube B at the end of the  experiment (1mk)
• Suggest a control for this experiment (1mk)
• Give two reasons why accumulation of lactic acid during vigorous  exercise lead to an increase in heart beat. (2mks)
• Name the process (1mk)
• State the economic importance of process name in (a) above.  (1mk)
• Other than carbon dioxide, name the other products of anaerobic  respiration in plants. (2mks)
• Name the substance which accumulates in muscles when respiration  occurs with insufficient oxygen. (1mk)
• In what form is energy stored in muscles? (1mk)
• State the economic importance of anaerobic respiration in plants.  (2mks)
• State four ways in which respiratory surfaces are suited to their function.  (4mks)
• A dog weighing 15.2kg requires 216kJ while a mouse weighing  50g requires 2736KJ per day. Explain. (2mks)
• What is the end product of respiration in animals when there is  insufficient oxygen supply? (1mk)
• Plants (1mk)
• Animals (1mk)
• What is oxygen debt? (1mk)
• What do you understand by the term respiratory quotient? (1mk)
• Determine respiratory quotient of the oxidation of food substance.  (2mks)
• Identify the food substances. (1mk)
• Write differences between aerobic respiration and photosynthesis. (4mks)

• Name the organelle (1mk)
• Name the parts labeled A, B, and C. (3mks)
• What is the purpose of the folding labeled D? (1mk)
• Give the chemical compound which is formed in the organelle and  forms the immediate source of energy.

3. Gaseous Exchange Questions and Answers - Biology Form 2 Topical Revision

• Terrestrial Insects (9mks)
• Bony fish (11mks)
• Explain how mammalian lungs are adapted for gaseous exchange.  (8mks)
• Respiring muscle cells reaches the alveolar cavities in  mammalian lungs.
• Respiring mesophyll cells of flowering plants reaches the  atmosphere. (12 mks)
• Describe the path taken by carbon dioxide released from the tissues  of an insect to the atmosphere.
• Name two structures used for gaseous exchange in plants. (2mks)
• Why are gills in fish highly vascularized? (1mk)
• Process of inhalation in mammals. (10 mks)
• Mechanism of opening and closing of stomata (10 mks)
• Name three sites where gaseous exchange takes place in terrestrial  plants. (3mks)
• State two ways in which floating leaves of aquatic plants are adapted to  gaseous exchange. (2mks)
• Name two structures for gaseous exchange in aquatic plants.  (2mks)
• What is the effect of contraction of the diaphragm muscles during  breathing in mammals? (3mks)

• Name the structure labeled K, L and M (3mks)
• How is the structure labeled J suited to its functions? (3mks)
• Name the process by which inhaled air moves from the structure  labeled L into blood capillaries. (1mk)
• Give the scientific name of the organism that causes tuberculosis in  humans. (1mk)
• State three factors that make alveolus adapted to its function. (3mks)
• Explain how the alveoli are ventilated.
•  Explain why water logging of the soil may lead to death in plants. (2mks)
• Write three advantages of breathing through nose than through mouth.  (3mks)
• State and explain ways the leaves are adapted for gaseous exchange ( 4mks)
• Name three gaseous constituents involved in gaseous exchange in plants.  (3mks)
• Name three sites of gaseous exchange in frogs. (3mks)
• Amoeba (4mks)
• Name the physiological process by which gas exchange takes place at the  respiratory surface in animals and plants (1mk)

• Name parts labeled W, Y and Z.
• How does the part labeled Z facilitates breathing in? (1mk)
• How is aerenchyma tissue adapted to its function? (2mks)

4. Excretion and Homeostasis Questions and Answers - Biology Form 2 Topical Revision

• In an investigation the pancreatic duct of a mammal was blocked. It was found  that the blood sugar regulation remained normal while food digestion was  impaired. Explain these observations. (2 marks)
• Explain why the body temperature of a healthy human being must rise up to  39 0 c on a humid day. (2 marks)
• In an experiment a piece of brain was removed from rat. It was found that  the rat had large fluctuations of body temperatures suggest the part of the  brain that had been removed. (1 mark)
• Explain why sweat accumulates on a person’s skin in a hot humid e nvironment. (2 marks)
• Name the specific part of the brain that triggers sweating.  (1 marks)
• Explain why some desert animals excrete uric acid rather than ammonia.  (2 marks)
• Insulin (3 marks)
• Antidiuretic Hormone (3 marks)
• What osmoregulatory changes would take place in a marine amoeba if it was  transferred to a fresh water environment?
• Name two components of blood that are not present in glomerular filtrate.  (2 marks)
• How would one find out from a sample of urine whether a person is suffering  from diabetes mellitus? (2 marks)
• When is glycogen, which is stored in the liver, converted into glucose and  released into the blood? ( 2 marks)
• Diseases the person was suffering from (1 marks)
• Hormone that was deficient (1 mark)
• State the importance of osmoregulation in organisms ( 2 marks)
• What happens to excess fatty acids and glycerol in the body? (2 marks)
• Constant body temperature is maintained in mammals ( 1 mark)
• Low blood sugar level is harmful to the body ( 2 marks)

• Explain why the temperature fell during the bath ( 2 marks)
• What changes appeared in the skin that enabled the body temperature to return to  normal. (2 marks)
• Name the fluid that is produced by sebaceous glands (1 mark)
• What is the role of sweat on the human skin? ( 2 marks)
• State the role of insulin in the human body? ( 1 mark)
• Homeostasis ( 1 mark)
• Osmoregulation (1 mark)
• Name the hormones involved in regulating glucose level in blood
• Explain what happens to excess amino acids in the liver of humans.  (3 marks)
• Which portions of the human nephrons are only found in the cortex?  (3 marks)
• What would happen if a person produced less antidiuretic hormone?  (1 mark)
• What term is given to the condition described in (c) (i) above?  (1 mark)
• Egestion ( 3 marks)
• Name the components of blood that do not enter the renal tubule in mammals  (2 marks)

• Name the process responsible for the formation of glomerular filtrate.
• What process is responsible for the absence of glucose and amino acids in urine?
• Explain why there are no plasma proteins in the glomerular filtrate
• Besides plasma proteins what other major component of blood is absent in the  glomerular filtrate.
• Why is the concentration of urea in urine much higher than its concentration in  the glomerular filtrate?
• When the environmental temperature is very high, some animals urinate on their  legs or lick the sides of their body. How does this help in temperature regulation?
• Fish are able to use more of their food intake for growth than mammals. Suggest  an explanation for this.
• Explain the term negative feedback

• Name the blood vessels labeled A, B and C.
• Amino acids
• Carbon (IV) oxide
• During fasting, the level of blood glucose in vessels C may be higher than the  level in vessel B explain
• Describe how the human kidney functions. ( 20 marks)

Biology Form 3 Topical Revision Questions and Answers (4)

For the preparation of national and local exams, get biology form 3 topical revision questions with answers for  free .

These biology topical revision questions are aggregated from the various high school KICD approved textbooks, including KLB biology form 3, Finder biology form 3, Mentors biology form 3, Spotlight biology form 3, Moran biology form 3, Pearsons biology form 3, etc.

The form 3  biological concepts that you can revise with these topical revision questions include;

You can get the topical revision questions for free without having to pay a cent on our  Easy Elimu Study App , which you can get from Google Playstore  here .

As a bonus, if you need to refresh your knowledge on a topic, EasyElimu has summarized notes, so you won’t have to stress over looking for notes , which makes passing that summative biology form 3 term 3 exam easy.

Whether it’s term 1, 2 or 3, these free biology form 3 revision topical questions will give you that grade A.

Classification II Questions and Answers - Biology Form 3 Topical Revision

• State two ways in which some fungi are harmful to man ( 2 marks)

• Parts labeled A and B ( 2 marks)
• The division which the plant belongs ( 1 mark)
• An organism with an exoskeleton, segmented body, two pairs of legs per  segment, a pair of eyes and a pair of eyes and a pair of short antennae belongs to  the phylum ( 1 mark)
• When are two organisms considered to belong to the same species? ( 2 marks)
• A student caught an animal which had the following characteristics; - Body divided into two parts - Simple eyes - Eight legs The animal belongs to the class ( 1 mark)

• State two characteristics features of members of division bryophyte  (2 marks)
• State two ways in which some fungi are beneficial to humans ( 2 marks)
• Other than having many features in common state the other characteristics of  species ( 1 mark)
• Beside the abdomen, name the other body part of members of arachnida  (1 mark)
• Name the phylum whose members possess notochord. ( 1 mark)
• Name the class in the phylum arthropoda which has the largest number of  individuals ( 1 mark)
• To which class does an animal with two body parts and four pairs of legs belong?  (1 mark)
• Name two organisms that cause food spoilage ( 2 marks)
• Name two methods of food preservation and for each state the biological  principal behind it. ( 2 marks)
• List two characteristics that mammals share with birds ( 2 marks)
• State two major characteristics that are unique to mammals ( 2 marks)
• What two characteristics distinguish animals in phylum chordata? ( 2 marks)

• Name the parts labeled A and B (2 marks)
• Name the division to which the plant belongs ( 1 mark)
• Which is the dominant generation of the plant in the diagram? (1 mark)
• State three characteristics of the organisms in the division named (b)  above?
• What three characteristics are used to divide the arthropods into classes?  (3 marks)
• Write two differences between algae and fungi ( 2 marks)
• Give the economic importance of algae ( 1 mark)
• What is alteration of generations? ( 3 marks)
• Name two divisions in plant kingdom that shows alternation of generation  (2 marks)
• A millipede, grasshopper and crayfish all belong to phylum arthropoda. Mention three major characteristics that they have in common. (3 marks)
• Identify two errors that have been made when writing the name
• What is the species name of Irish potato?
• An ecologist came across a plant with the following characteristics, green  in colour, non- flowering, compound leaves and sori on the underside of  the leaflets. State the probable division of the plant. ( 1 mark)
• An organism with an exoskeleton, segmented body, two pairs of legs per segment,  a pair of eyes and a pair of short antennae belongs to the class ( 1 mark)
• List the main characteristics that are used to sub- divide arthropods into classes  (2 marks
•  Name the main method of reproduction among bacteria. ( 1 mark)

Ecology Questions and Answers - Biology Form 3 Topical Revision

• State how excessive use of pesticides may affect soil fertility

• Describe the procedure that may have been used to determine the mean  body length of the fish ( 6 marks)
• What are the likely reasons for the difference in the mean body length of  the fish living in lakes A and D? ( 4 marks)
• Suggest one reason for the absence of snails in lakes C and D?  (1 mark)
• Name any six abiotic (physical) factors that are likely to influence  the plant and animal life in lake A. ( 3 marks)
• Explain how each of the factors named in (i) may influence the  plant and animals life in Lake A. ( 6 marks)
• From this record of observations construct a feed web (5 marks)
• Bird species as a secondary consumer (1 mark)
• Large fish as tertiary consumer (1 mark)
• The biomass of the producers in the lake was found to be greater than that  of primary consumers. Give an explanation for this observation? (1 mark)
• Two organisms that compete for food in the lake. (2 marks)
• The source of food the organisms in d (i) above compete for  (1 mark)
• State three ways by which many may interfere with this lake  ecosystem ( 3 marks)
• Explain how each of the ways you have states may affect life in the  lake? ( 6 marks)
• Plant A ( 1 mark)
• Plant B ( 1 mark)

• In which year were the fish populations lowest?
• State the factors that might have caused the lowest fish populations during  the year you have stated in (a) (i) above ( 3 marks)
• Explain how each factor you have stated in (a) (ii) above could have  brought about the changes in fish populations (11 marks)
• What is the difference in the rate of population recovery of species A and  D? (1 mark)
• Suggest two biological factors that could have led to this difference  (2 marks)
• State a method that might have been used to estimate the fish population  in the lake ( 1 mark)
• State one disadvantage of the method you have stated in (c) (i) above  (1 mark)
• Industrial wastes may contain metallic pollutants. State how such pollutants may  indirectly reach and accumulate in the human body if the wastes were dumped  into rivers.
• State three measures that can betaken to control infection of man by protozoan  parasites ( 3 marks)

• Construct two food chains ending with a tertiary consumer in each case (2 marks)
• Which organisms has the largest variety of predators in the food web? (1 mark)
• Name secondary consumers in the food web ( 2 marks)
• Suggest three ways in which the ecosystem would be affected if there was  prolonged drought ( 3 marks)
• Calculate the population size of the crabs in the lagoon using the formula below N = n x M          M Where N= Total population of crabs in the lagoon n= Total number of crabs in the second catch M= Number marked crabs during the first catch M= Number of marked crabs in the second catch. ( 2 marks)
• State two assumptions that were made during the investigation ( 2 marks)
• What is the name given to this method of estimating the population size?  (1 mark)

• Write down the food chains in which the guinea fowls are secondary consumers  (1 mark)
• What would be the short term effects on the eco- system of lions invaded the  area? ( 3 marks)
• Name the organisms through which energy from the sun enters the food web.  (1 mark)

• Name the organisms that causes processes E and J ( 2 marks)
• Name the processes represented by F and H (2 marks)
• Name the group of organisms represented by c (i)
• Distinguish between a community and a population (2 marks)
• Describe how a population of grasshopper in a given area can be estimated  (5 marks)
• Explain how the various activities of man have caused pollution of air ( 20 marks)
• Explain how birds of prey are adapted to obtaining their food ( 2 marks)
• Name the crop infested by phytophthora infestants and the disease it  causes Crop - Disease -
• State four control measures against the diseases ( 4 marks)
• Explain why the carrying capacity for wild animals is higher than for cattle in a  given piece of land ( 2 marks)
• Autecology ( 1 mark)
• Synecology ( 1 mark)

• State the modification found in the stomata of leaf C
• Name the organism that causes amoebic dysentery.

• Name the process through which energy from the sun is incorporated into the  food web ( 1 mark)
• State the mode of feeding of the birds in the food web (1 mark)
• Name two ecosystem in which the organisms in the food web live( 2 marks)
• From the information in the food web construct a food chain with the large bird  as a quarter – nary consumer ( 1 mark)
• What would happen to the organisms in the food web if bird N migrated?
• Not all energy from one trophic level is available to the next level. Explain  (3 marks)
• Two organisms, which display a role in the ecosystems, are not included  in the food web. Name them. ( 1 mark)
• State the role played by the organisms named g (i) above. (1 mark)
• State three human activities that would affect the ecosystems ( 3 marks)
• How would the activities stated in h (i) above affect the ecosystems?  (3 marks)
• How is aerenchyma tissue adapted to its functions? ( 2 marks)
• Explain how abiotic factors affect plants ( 20 marks)

• Distinguish between pyramid of numbers and pyramid of Biomass  (2 marks)
• Give three reasons for loss of energy from one trophic level to another in a  food chain. ( 3 marks)
• Describe how the belt transect can be used in estimating the population of  a shrub in a grassland ( 2 marks)
• Distinguish between population and community ( 2 marks)
• Fish in a pond ( 1 mark)
• Black jack in a garden ( 1 mark)
• State two ways in which schistosoma species is adapted to parasitic mode of life
• Describe causes and methods of controlling water pollution ( 20 marks)
• What is biological control of population growth? ( 2 marks)
• Describe one example where biological control has been used successfully  (2 marks)
• Explain why the number of predators in nay ecosystem is less than the  number of their prey ( 1 mark)
• Antelopes are more commonly found in open grassland while giraffe  while giraffes are commonly found in wooded areas. ( 2 marks)
• In the savannah there is a wider variety of herbivores in wooded areas than  in open grassland ( 1 mark)
• Removal of predators for an herbivore may in the long run lead to a  decrease in its population
• Explain why primary productivity decreases with depth in aquatic environments.  (2 marks)

• Identify the compound named A ( 1 mark)
• Name the processes X _________________ Y _________________ Z _________________
• In what form is nitrogen found in plants and animals?

• Fruits found in forest and savannah ( 2 marks)
• Seed found in forest and savannah ( 2 marks)
• State two factors that may cause this difference in (a) above ( 2 marks)

• Which species show more fluctuation in numbers? ( 1 mark)
• Suggest an explanation of this ( 3 marks)
• Suggest two ways by which the savannah environment can be destroyed and how  it can be conserved ( 4 marks)

Reproduction in Plants and Animals Questions and Answers - Biology Form 3 Topical Revision

• At what stage of mitosis do chromosomes replicate to form daughter chromatid?  (1 mark)
• Fill in the blank spaces in the statement below After fertilization of an ovule _________ develops into a testa and _________  develops into a testa and _____________ develops into endosperm. ( 2 marks)
• State the difference between the composition of maternal blood entering the  placenta and material blood leaving the placenta ( 3 marks)
• After four months of pregnancy the ovaries of a woman can be removed without  terminating pregnancy. However during the first four months of pregnancy the  ovaries must remain intact if pregnancy is to be maintained. Explain these  observations ( 3 marks)
• Name two mechanisms that prevent self pollination in flowers that have both  male and female parts ( 2 marks)
• State three characteristics that ensure cross pollination takes place in flowering  plants ( 3 marks)
• Give a reason why it is necessary for frogs to lay many eggs ( 1 mark)
• What is the likely agent of pollination of the flower? ( 1 mark)
• What is the significance of the long feathery stigma in the flower ( 1 mark)
• State two ways by which the human Immuno Deficiency virus (HIV) is  transmitted other than sexual intercourse? ( 2 marks)
• Explain why sexual reproduction is important in organisms ( 3 marks)
• State two disadvantages of self- pollination ( 2 marks)

• What type of cell division takes place at Z? ( 1 mark)
• Where in the body of a female does process Z occur? ( 1 mark)
• On the chart indicate the position of parent and gametes ( 2 marks)
• Epigynous flower ( 1 mark)
• Staminate flower (1 mark)
• How are the male parts of wind- pollinated flowers adapted to their function?  (4 marks)
• Seed (1 mark)
• Fruit (1 mark)
• State two processes which occur during anaphase of mitosis ( 2 marks)
• What is the significance of meiosis? (2 marks)
• Protoandry ( 1 mark)
• Self- sterility ( 1 mark)
• Give three advantages of cross- pollination ( 3 marks)

• Name the part labeled S ( 1 mark)
• Name the types of blood vessels found in the structure labeled Q  (2 marks)
• State the difference in composition of blood in the vessels named (b) (i)  above ( 2 marks)
• Name two features that enable the structure labeled P carry out its function  (2 mark)
• State the role of the part labeled R ( 1 mark)

• Identify the stage of cell division ( 1 mark)
• Give three reasons for your answer (a) (i) above ( 2 marks)
• Name the structure labeled M ( 1 mark)
• State two disadvantages of sexual reproduction in animals ( 2 marks)
• Protandry ( 1 mark)

• Name the parts labeled Q, R, and S ( 3 marks)
• State two functions of the pollen tube ( 2 marks)
• On the diagram, label the micropyle ( 1 mark)
• Describe how insect pollinated flowers are adopted to pollination  (6 marks)
• Luteinizing hormone ( 3 marks)
• Describe the role of hormones in the human menstrual cycle (20 marks)
• Nutrition of the embryo
• Protection of the embryo ( 4 marks)

Growth and Development Questions and Answers - Biology Form 3 Topical Revision

• Explain why several auxiliary buds sprout when a terminal bud in a young tree is  removed.
• Account for loss in dry weight of cotyledons in a germinating bean seed.
• What is the effect of gibberellins on shoots of plants?

• What was the aim of the experiment?
• What would be the expected results at the end of the experiment?
• State two advantages of metamorphosis to the life of insects
• During germination and early growth, the dry weight of endosperm decreases  while that of the embryo increases. Explain

• What was this set up supposed to investigate?
• Why was pyrogallic acid included in glass jar A?
• Explain why glass jar C and D were included in the experiment
• What result would you expect in glass jar A and B at the end of the experiment?
• State two artificial ways of breaking seed dormancy
• Give reasons for the development of the lateral braches after the removal of the  apical bud
• Suggest one application of this practice
• What is the importance of this practice?
• Suggest the expected changes in the composition of gases in the flask on the fifth day
• Give four reasons for your answer in (a) above
• Name two factors that cause dormancy in seeds
• Distinguish between epigeal and hypogeal germination (1 mark)
• Why is oxygen necessary in the germination of seeds? (2 marks)

• Using the same axes, draw graphs to show the length of branches against time  (8 marks)
• What was the length of the branch in shoot B on the 7 th day? ( 1 mark)
• What would be the expected length of the branch developing from shoot A  on the 11 th day? ( 1 mark)
• Account for the results obtained in the experiment ( 6 marks)
• Why was shoot C included in the experiment? ( 1 mark)
• What is the importance of gibberallic acid in agriculture? ( 1 mark)
• State two physiological processes that are brought about by the application of  gibberellic acid on plants. ( 2 marks)
• State tow environmental conditions that can cause seed dormancy
• Name the part of a bean seed that elongates to bring about epigeal germination  (1 mark)
• “True growth is not simply an increase in size” State four different ways  in which true may be defined.
• State two external factors, which influence growth in plants and describe  one effect of each.

• Why is dry mass used for comparison?
• How would one ensure that the drying process had been completed
• Account for the decrease in the total dry mass of the seedlings
• Why did the seedling contain more cellulose than the underminated seeds?
• What is the most likely source of the carbon used to form this new cellulose?

Biology Form 4 Topical Revision Questions and Answers (4)

For the preparation of national and local exams, get biology form 4 topical revision questions with answers for  free .

These biology topical revision questions are aggregated from the various high school KICD approved textbooks, including KLB biology form 4, Finder biology form 4, Mentors biology form 4, Spotlight biology form 4, Moran biology form 4, Pearsons biology form 4, etc.

The form 4  biological concepts that you can revise with these topical revision questions include;

As a bonus, if you need to refresh your knowledge on a topic, EasyElimu has summarized notes, so you won’t have to stress over looking for notes, which makes passing that summative biology form 4 term 3 exam easy.

Whether it’s term 1, 2 or 3, these free biology form 4 revision topical questions will give you that grade A.

Genetics Questions and Answers - Biology Form 4 Topical Revision

• Giving a reason, name the nucleic acid to which the portion belongs.  (2 marks) Name _________________________ Reason ________________________
• Write down the sequence of bases of a complimentary strand to that  shown above (1 mark)
• State two structural differences between ribonucleic acid ( RNA) and  deoxyribonucleic acid ( DNA) (2 marks)
• Name a disorder of human blood that is caused by mutation (1 mark)
• State the function of deoxyribonucleic acid (DNA) molecule (1 mark)
• Give a reason why it is only mutation in genes of gametes that influence  evolution ( 2 marks)
• (Give a reason for the appearance of pink flower in the F1  generation ( 1 mark)
• If the plants from F1 generation were selfed, state the phenotype  ratio of the F2 generation ( 2 marks)
• State two characteristics that researchers select in breading programmes.  (2 marks)
• Give an example of sex- linked trait in humans on; ( 2 marks) Y chromosome __________________ X chromosome __________________
• Using appropriate letter symbols, work out the genotype of the F1  generation. ( 4 marks)
• Genotype ratio ( 2 marks)
• Phenotype ratio ( 1 mark)
• Wrinkled number ( 1 mark)
• Work out the genotype of F1 generation ( 3 marks)
• If the plants from F1 generation were selfed, what would be the  phenotypic ratio of the F2 generation? ( 3 marks)
• What is the genetic explanation for the absence of plants with red  and white in the flower F1 generation? ( 2 marks)
• Identify the recessive character. Give a reason
• What were the genotypes of the parent plants that give rise to the  plants with red and white flowers?
• If the white flowers were selfed, what would be the genotypes of their  offspring?
• Name two disorders in humans caused by gene mutation  (2 marks)
• Inversion ( 2 marks)
• Translocation
• In mice the allele for black fur is dominant to the allele for brown  fur. What percentage offspring would have brown fur from a  cross between heterozygous black mice and brown mice? Show  your working. Use letter B to represent the allele for black colour. ( 4 marks)
• What is meant by the term allele? ( 1 mark)
• Deletion ( 1 mark)
• Inversion ( 1 mark)
• What is a test- cross? ( 1 mark)
• Using letter G to represent the gene for purple colour, work out  the genotypic ratio of the offspring ( 5 marks)
• State the phenotype of the offspring ( 1 mark)
• What is genetic engineering? ( 1 mark)
• State why the calf is light red and not dark red or white
• If a light red bull is mated with a dark red cow, work out using  appropriate letter symbols the probability of getting a light offspring
• What is meant by linked genes?
• In fruit flies (Drosophila) the gene for red eyes ® is dominant over  the one for white – eye (r). If a true breeding white – eyed male, all  the offspring will be red eyed. However, if a true – breeding whiteeyed female is mated with a true- breeding red- eyed male, all the  female offspring will be red – eyed. Explain this apparent  contradiction.
• Work out the ratio of the expected phenotypes if a red- eyed  female offspring from the cross- described in (i) above is mated  with red- eyed males.
• Explain the term variation with reference to the study of genetics.
• Using relevant examples distinguish between discontinuous  variation and continuous variation
• What is the importance of genetic variation?
• Describe one example where genetic variations has helped a  species to survive
• What do the letters G, T , C and A represent?
• Giving your reasons state whether it is part of DNA or an RNA  strand.
• Show the complementary DNA strand
• Show the complimentary RNA strand
• In human couples the sex of a baby is determined by the man. Explain this  statement.

Evolution Questions and Answers - Biology Form 4 Topical Revision

• State the difference between Lamarckian and Darwinian theories of evolution
• Two populations of the same species of birds were separated over a long period of  time by an ocean. Both populations initially fed on insects only. Later it was  observed that one population fed entirely on fruits and seeds. Although insect  were available. Name this type of evolutionary change.
• Explain why Lamarck’s theory of evolution is not accepted by biologists today
• State three pieces of evidence that support the theory of evolution. (3 marks)
• state two advantages of natural selection to organisms (2 marks)
• Fossils records
• Comparative anatomy
• Describe how natural selection brings about adaptation of a species to its  environment (6 marks)
• Explain how the process of evolution may result to the formation of new species
• organic evolution (1 mark)
• continental drift (1 mark)
• Explain continental drift as an evidence of evolution (3 marks)
• What is a test- cross? (2 marks)
• Give a reason why organisms become resistant to drugs (1 mark)
• Homologous structures
• Analogous structures (4 marks)
• What is meant by natural selection?
• Explain the role played by mutation in evolution (5 marks)
• Hybrid vigour
• The peppered moth exists in two varieties, which are genetically controlled. The  dark variety is found predominantly in industrial cities and the white variety is  found predominantly in rural areas. Explain how this pattern of distribution  supports the theory of evolution by natural selection (6 marks)
• Special creation (2 marks)
• Organic evolution (2 marks)

Reception, Response and Co-ordination Questions and Answers - Biology Form 4 Topical Revision

• State one structural and one functional differences between motor and sensory  neurons Structural differences Functional differences ( 2 marks)

• With an arrow, indicate on the diagram the direction of the impulse  through the neurone ( 1 mark)
• State the functions of parts labeled P and Q ( 2 marks)
• How are structures of the human eye adapted to their functions (14 marks)
• State three defects of the eye and how each can be corrected (6 marks)
• State the changes that occur in a nerve axon to produce an action potential  (3 marks)
• In an accident a victim suffered brain injury. Consequently he had loss of  memory. Which part of the brain was damaged? ( 1 mark)
• Name the parts labeled B and C ( 2 marks)
• State three functions of the part labeled A ( 3 marks)
• State what would happen if the part labeled B was damaged. ( 1 mark)
• Tympanic membrane ( 3 marks)
• Eustachian tube ( 1 mark)
• Ear ossicles ( 2 marks)
• Describe how semi- circular canals perform their functions ( 2 marks)
• State the importance of tactic response among some members of Kingdom  Protoctista? ( 1 mark)
• What name is given to response to contact with surface exhibited by  tendrils and climbing stems in plants? ( 1 mark)
• State three biological importances of tropisms to plants (3 marks)

• Name the parts labeled X and Y ( 2 marks) X __________________________ Y __________________________
• Name the substance that is responsible for the transmission of an impulse across  the synapse ( 1 mark)
• State the function of the ciliary muscles in the human eye. (1 mark)
• State two functional differences between the rods and cones in the human eye  (2 marks)
• Ear ossicles
• Semi- circular canals
• Eustachian tube
• Where in the human body are relay neurons found? ( 1 mark)

• Name the neurone ( 1 mark)
• Name the parts labeled P and Q ( 2 marks)
• Name the hormone that is responsible for apical dominance (1 mark)
• What is thigmotropism? (1 mark)
• Describe the structure and functions of the various parts of the human ear  (20 marks)
• Nocturnal animals such as the owl are capable of seeing fairly well at night What two retinal adaptations have made this possible? (2 marks)
• State two functions of the human ear? (2 marks)
• State four differences between co- ordination of the human eye’s internal  response to light and that of tropic movement of the flowering plant in response to  light. (4 marks)

• What is the name of the response, which causes the twisted growth?  (1 mark)
• Explain how the twisting process is accomplished (2 marks)
• Identify the state of leaves if the plant is autotrophic (2 marks)
• Euglena is positively phototactic. Of what biological significance is this  characteristics? (1 mark)
• State the function of acetylcholine (2 marks)
• Where in the human body is the relay neurone located? ( 1 mark)
• State three effects of nicotine to human health (3 marks)
• Colour vision
• Maintaining shape of the eyeball
• Change in diameter of the lens

Support and Movement in Plants and Animals Questions and Answers - Biology Form 4 Topical Revision

• State the function of the part labeled K and L ( 2 marks)
• State the region of the body in which the bone is found ( 1 mark)
• State two ways in which skeletal muscle fibres are adapted to the function  (2 marks)
• Name the parts of the bone labeled K ( 1 mark)
• How do the muscles work to extend the arm? ( 3 marks)

• Name the bone ( 1 mark)
• Name the type of joint formed by the bone at its anterior end with the  adjacent bone (1 mark)
• Give a reason why the lumbar vertebrae have long and abroad transverse  processes ( 2 marks)
• Name the three types of skeletons found in multicellular animals  (3 marks)
• Describe how the cervical, lumbar and sacral vertebrae are suited to their  functions (17 marks)

• Which bones articulate with the bone shown in the diagram at the notch?  (2 marks)
• Name the cartilage between the bones of the vertebral column  (1 mark)]
• State the function of the cartilage in (a) above ( 1 mark)
• How are xylem vessels adapted for support? ( 1 mark)

• Name the bones labeled X, Y, and Z ( 3 marks) X _______________________ Y _______________________ Z _______________________
• Name the substance found in the place labeled W (1 mark)
• State the function of the substance named in (b) (i) above
• Name the structure that joins the bones together at the joint (1 mark)
• State the differences between ball and socket joint and the one illustrated  in the diagram above (1 mark)
• Name the structure at the elbow that performs the same functions as the  patella (1 mark)
• State a characteristic that is common to all cervical vertebrae
• Name two tissues in plants that provide mechanical support (2 marks)
• Name the three types of muscles found in mammals and give an example  of where each on of them is found
• State the difference between ball and socket and hinge joint (1 mark)
• State three functions of an insects exoskeleton (3 marks)
• Dorsal fin (1 mark)
• Pectoral and pelvic fins (1 mark)
• Caudal fin (1 mark)
• State the diagnostic features of the cardiac muscles (3 marks)

• Make a complete drawing of the girdle (1 mark)
• Name the bones that articulate with the pelvic girdle. In each case name  the part that articulates with (2 marks)
• Distinguish between tendons and ligaments (2 marks)
• Explain what antagonistic muscles are and give an example (4 marks)
• Name three types of strengthening tissues found in plants (3 marks)
• Explain how the tissue in (a) above are adapted to their functions  (3 marks)
• Name the three main types of joint ( 3 marks)
• Give an example of where each type of joint name in (a) above is found in  the human body ( 3 marks)
• What makes young herbaceous plant remain upright? ( 2 marks)]
• Name three types of muscles found in the human body, state where each type is  located and how each is adapted to its functions. ( 12 marks)

Discuss the various mechanisms that hinder self-pollination and self-fertilisation in plants - KCSE Biology Essay

Discuss the various ways in which anaerobic respiration is utilized in industries and homes - kcse biology essay, describe the defects that affect the mammalian eye and how they could be corrected - kcse biology essay.

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FUNDAMENTALS OF BIOLOGY

CHAPTER 2: CELL BIOLOGY & ORGANISATION

CHAPTER 3: MOVEMENT OF SUBSTANCES ACROSS A PLASMA MEMBRANE

CHAPTER 4: CHEMICAL COMPOSITION IN A CELL

CHAPTER 5: METABOLISM & ENZYMES

CHAPTER 6: CELL DIVISION

CHAPTER 7: CELLULAR RESPIRATION

PHYSIOLOGY OF HUMANS & ANIMALS

CHAPTER 8: RESPIRATORY SYSTEMS IN HUMANS & ANIMALS

CHAPTER 9: NUTRITION & THE HUMAN DIGESTIVE SYSTEM

CHAPTER 10: TRANSPORT IN HUMANS & ANIMALS

CHAPTER 11: IMMUNITY IN HUMANS

CHAPTER 12: COORDINATION & RESPONSE IN HUMANS

CHAPTER 13: HOMEOSTASIS & THE HUMAN URINARY SYSTEM

CHAPTER 14: SUPPORT & MOVEMENT IN HUMANS & ANIMALS

CHAPTER 15: SEXUAL REPRODUCTION, DEVELOPMENT & GROWTH IN HUMANS & ANIMALS

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Form 4 Biology Notes

Form 4 biology notes | kcse.

Procedure to Download Form 4 Biology Notes

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Blog The Education Hub

https://educationhub.blog.gov.uk/2024/08/20/gcse-results-day-2024-number-grading-system/

GCSE results day 2024: Everything you need to know including the number grading system

Thousands of students across the country will soon be finding out their GCSE results and thinking about the next steps in their education.   

Here we explain everything you need to know about the big day, from when results day is, to the current 9-1 grading scale, to what your options are if your results aren’t what you’re expecting.  

When is GCSE results day 2024?  

GCSE results day will be taking place on Thursday the 22 August.     

The results will be made available to schools on Wednesday and available to pick up from your school by 8am on Thursday morning.  

Schools will issue their own instructions on how and when to collect your results.   

When did we change to a number grading scale?  

The shift to the numerical grading system was introduced in England in 2017 firstly in English language, English literature, and maths.  

By 2020 all subjects were shifted to number grades. This means anyone with GCSE results from 2017-2020 will have a combination of both letters and numbers.  

The numerical grading system was to signal more challenging GCSEs and to better differentiate between students’ abilities - particularly at higher grades between the A *-C grades. There only used to be 4 grades between A* and C, now with the numerical grading scale there are 6.  

What do the number grades mean?  

The grades are ranked from 1, the lowest, to 9, the highest.  

The grades don’t exactly translate, but the two grading scales meet at three points as illustrated below.  

The bottom of grade 7 is aligned with the bottom of grade A, while the bottom of grade 4 is aligned to the bottom of grade C.    

Meanwhile, the bottom of grade 1 is aligned to the bottom of grade G.  

What to do if your results weren’t what you were expecting?  

If your results weren’t what you were expecting, firstly don’t panic. You have options.  

First things first, speak to your school or college – they could be flexible on entry requirements if you’ve just missed your grades.   

They’ll also be able to give you the best tailored advice on whether re-sitting while studying for your next qualifications is a possibility.   

If you’re really unhappy with your results you can enter to resit all GCSE subjects in summer 2025. You can also take autumn exams in GCSE English language and maths.  

Speak to your sixth form or college to decide when it’s the best time for you to resit a GCSE exam.  

Look for other courses with different grade requirements     

Entry requirements vary depending on the college and course. Ask your school for advice, and call your college or another one in your area to see if there’s a space on a course you’re interested in.    

Consider an apprenticeship    

Apprenticeships combine a practical training job with study too. They’re open to you if you’re 16 or over, living in England, and not in full time education.  

As an apprentice you’ll be a paid employee, have the opportunity to work alongside experienced staff, gain job-specific skills, and get time set aside for training and study related to your role.   

You can find out more about how to apply here .  

Talk to a National Careers Service (NCS) adviser    

The National Career Service is a free resource that can help you with your career planning. Give them a call to discuss potential routes into higher education, further education, or the workplace.   

Whatever your results, if you want to find out more about all your education and training options, as well as get practical advice about your exam results, visit the  National Careers Service page  and Skills for Careers to explore your study and work choices.   

You may also be interested in:

• Results day 2024: What's next after picking up your A level, T level and VTQ results?
• When is results day 2024? GCSEs, A levels, T Levels and VTQs

Tags: GCSE grade equivalent , gcse number grades , GCSE results , gcse results day 2024 , gsce grades old and new , new gcse grades

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• Teachers' Resources

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Also read the popular TSC News below;

• Tsc: New Delocalization policy to affect the following category of teachers. Checkout the most affected category and prepare https://www.newskali.com/tscnew-delocalization-policy-to-affect-the-following-category-of-teachers-checkout-the-most-affected-category-and-prepare/
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투자 계획과 레버리지 레버리지는 특히 성장 잠재력이 높은 기업에 투입할 때 효과적입니다. 이러한 기업에 높은 비중으로 투자하면, 잘 될 경우 큰 이익을 가져올 수 있지만, 반대 경우의 경우 큰 위험도 짊어져야 합니다. 그러므로, 투자하는 사람은 자신의 리스크 관리 능력과 시장 분석을 통해, 일정한 기업에 얼마만큼의 자금을 투자할지 선택해야 합니다.

레버리지 사용의 장점과 위험성 레버리지 스탁은 큰 이익을 보장하지만, 그만큼 상당한 위험도 따릅니다. 주식 시장의 변동은 추정이 곤란하기 때문에, 레버리지 사용을 이용할 때는 늘 상장 동향을 정밀하게 관찰하고, 손실을 최소화하기 위해 수 있는 계획을 세워야 합니다.

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Engaging Advancements and Renowned Releases in the Domain of Videogames

In the dynamic environment of interactive entertainment, there’s always something new and exciting on the forefront. From modifications optimizing revered mainstays to new releases in renowned series, the gaming realm is flourishing as in current times.

We’ll take a snapshot into the newest developments and certain the renowned releases mesmerizing players across the globe.

Most Recent Developments

1. New Customization for Skyrim Improves NPC Aesthetics A recent mod for The Elder Scrolls V: Skyrim has attracted the attention of players. This mod brings lifelike faces and realistic hair for every non-player characters, enhancing the experience’s graphics and immersion.

2. Total War Series Experience Situated in Star Wars Setting Galaxy Under Development

The Creative Assembly, acclaimed for their Total War Series lineup, is allegedly crafting a anticipated release set in the Star Wars Setting world. This exciting collaboration has gamers eagerly anticipating the tactical and compelling gameplay that Total War Series releases are known for, at last set in a world remote.

3. GTA VI Release Confirmed for Autumn 2025 Take-Two Interactive’s CEO has communicated that GTA VI is planned to debut in Fall 2025. With the colossal reception of its earlier title, GTA V, gamers are excited to see what the next iteration of this legendary universe will bring.

4. Enlargement Initiatives for Skull & Bones Second Season Developers of Skull and Bones have announced broader plans for the game’s second season. This high-seas journey provides upcoming updates and updates, engaging gamers captivated and enthralled in the domain of high-seas swashbuckling.

5. Phoenix Labs Studio Undergoes Workforce Reductions

Disappointingly, not all announcements is positive. Phoenix Labs Developer, the developer behind Dauntless Experience, has announced large-scale personnel cuts. In spite of this difficulty, the experience continues to be a iconic preference amidst gamers, and the studio stays dedicated to its fanbase.

Iconic Titles

1. The Witcher 3 With its captivating story, captivating domain, and engaging journey, The Witcher 3 remains a beloved game across players. Its rich narrative and wide-ranging free-roaming environment remain to captivate fans in.

2. Cyberpunk 2077 Game Despite a rocky release, Cyberpunk stays a much-anticipated experience. With constant updates and enhancements, the title keeps advance, delivering fans a glimpse into a dystopian setting filled with peril.

Even time subsequent to its initial arrival, Grand Theft Auto V continues to be a iconic option among players. Its sprawling nonlinear world, enthralling plot, and shared components maintain enthusiasts revisiting for ongoing journeys.

4. Portal A iconic brain-teasing game, Portal is renowned for its revolutionary gameplay mechanics and brilliant map design. Its intricate puzzles and amusing storytelling have cemented it as a remarkable release in the interactive entertainment landscape.

5. Far Cry 3 Game Far Cry 3 is celebrated as among the finest installments in the franchise, delivering fans an nonlinear adventure filled with danger. Its captivating plot and legendary entities have cemented its place as a iconic title.

6. Dishonored Game Dishonored is acclaimed for its covert gameplay and unique realm. Players assume the role of a otherworldly eliminator, exploring a metropolitan area teeming with political mystery.

7. Assassin’s Creed II

As part of the iconic Assassin’s Creed Universe series, Assassin’s Creed 2 is adored for its engrossing story, captivating gameplay, and era-based worlds. It remains a exceptional game in the collection and a favorite across enthusiasts.

In closing, the realm of interactive entertainment is prospering and fluid, with groundbreaking developments

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Cricket Affiliate: একটি অসাধারণ গেমিং অভিজ্ঞতা

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Gratis Slot Machines: Amusement and Perks for People

Summary Slot machines have traditionally been a staple of the gaming interaction, delivering participants the possibility to secure major payouts with merely the activation of a lever or the press of a mechanism. In the past few years, slot machines have likewise become popular in virtual gambling platforms, establishing them approachable to an even more more extensive population.

Fun Element Slot-based games are conceived to be entertaining and immersive. They present lively illustrations, exciting sound effects, and multifaceted themes that suit a wide range of interests. Whether customers relish nostalgic fruit-based imagery, excitement-driven slots, or slot-based games rooted in popular cinematic works, there is an alternative for everyone. This variety ensures that customers can always locate a activity that suits their tastes, delivering durations of amusement.

Uncomplicated to Interact With

One of the biggest upsides of slot-related offerings is their straightforwardness. Unlike certain wagering experiences that call for skill, slot-based activities are simple to understand. This constitutes them reachable to a extensive group, encompassing beginners who may perceive discouraged by increasingly elaborate experiences. The uncomplicated quality of slot machines permits users to unwind and savor the offering absent fretting about complicated protocols.

Unwinding and Destressing Interacting with slot-related offerings can be a wonderful way to unwind. The routine-based essence of triggering the wheels can be serene, providing a intellectual respite from the challenges of regular activities. The possibility for earning, even if it amounts to merely small sums, injects an aspect of suspense that can enhance users’ mindsets. Many people find that partaking in slot-based games facilitates them relax and forget about their problems.

Social Interaction

Slot-based activities in addition grant chances for communal interaction. In traditional casinos, players typically congregate in proximity to slot-related offerings, rooting for one another on and commemorating triumphs as a group. Internet-based slots have also included social aspects, such as rankings, permitting customers to interact with co-participants and share their experiences. This environment of community elevates the comprehensive entertainment experience and can be particularly enjoyable for individuals desiring group-based engagement.

Economic Benefits

The widespread adoption of slot machines has substantial monetary rewards. The sector generates employment for game developers, casino personnel, and customer services specialists. Also, the proceeds yielded by slot-based activities adds to the financial system, providing revenue incomes that finance governmental projects and infrastructure. This financial impact expands to both land-based and internet-based casinos, making slot-related offerings a beneficial component of the entertainment industry.

Intellectual Advantages Playing slot machines can also result in cognitive rewards. The activity demands participants to arrive at rapid selections, detect sequences, and supervise their staking strategies. These cognitive engagements can facilitate keep the mind alert and bolster cognitive faculties. For older adults, engaging in cerebrally stimulating experiences like interacting with slot-based activities can be beneficial for upholding mental health.

Approachability and Simplicity The emergence of virtual wagering environments has made slot-related offerings further available than before. Players can savor their cherished slot-based games from the ease of their individual residences, employing desktops, tablets, or cellphones. This user-friendliness permits people to engage with at any time and wherever they desire, absent the necessity to journey to a brick-and-mortar wagering facility. The accessibility of free slot-based activities in addition gives players to experience the activity without any cash outlay, making it an inclusive kind of entertainment.

Key Takeaways Slot-based activities deliver a abundance of benefits to individuals, from absolute fun to cognitive rewards and communal participation. They present a secure and cost-free way to savor the suspense of slot-based activities, rendering them a beneficial addition to the realm of online entertainment.

Whether you’re looking to destress, improve your cerebral skills, or solely experience pleasure, slot machines are a wonderful choice that continues to enchant players worldwide.

Prominent Benefits: – Slot-related offerings deliver pleasure through animated imagery, engaging soundtracks, and multifaceted concepts – Ease of play constitutes slot machines reachable to a comprehensive set of users – Engaging with slot-based games can grant destressing and cerebral benefits – Group-based aspects improve the comprehensive interactive sensation – Internet-based accessibility and complimentary alternatives constitute slot-related offerings accessible types of entertainment

In summary, slot-related offerings constantly provide a varied assortment of advantages that match users across. Whether desiring absolute entertainment, mental engagement, or social participation, slot-based games continue to be a excellent choice in the constantly-changing domain of virtual gaming.

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Description.

Solvo is your new superpower in education and beyond Maximize your academic potential with your own personal AI homework helper! Meet Solvo—an AI-powered math, chemistry, biology, physics solver & essay writer that revolutionizes the way you manage study assignments. Simply scan, type, or upload the task in front of you and let the app work its magic! Check out what Solvo can help you with: Scan & Solve • Scan and solve math problems, equations, and more Faced with a boss-level problem (e.g., you need science answers) and don’t know where to start? Snap a picture of it—you’ll see the result and in-depth solution steps. This way, you gain more insights into how to tackle certain tasks and become more confident solving them yourself next time! Math, science answers, and more—you name it, our AI homework helper helps with it in a flash. • Ace any test and quiz Our AI homework helper can answer all sorts of questions typically used in tests and quizzes, including true or false, multiple-choice, and open questions. Biology solver? Chemistry solver? It’s already in your pocket! Simply tap Text-Based Problems, snap a picture of the question, and get your answer in seconds. This feature can also help you test your knowledge and prepare for exams. Streamline Reading & Writing • Write killer essays in a breeze Have excellent ideas for your essay but find it hard to articulate them clearly? No problem—Solvo is an experienced essay writer! Simply tap Create Essay and type your subject. You can go ahead and use the output directly or to get your creative juices flowing. • Improve and reword your writing Solvo isn’t just an essay writer—it’s a great editor! Already prepared a draft of your text and need help with polishing it into something truly A grade-worthy? Just upload your writing to our AI homework helper, and the app will offer suggestions to reword and improve it. This can be a game-changer if you feel stuck with a writing assignment. • Read smarter, not harder Our AI homework helper can be a lifesaver if you need a quick overview of a book. Type the name of the book or its author, or upload the book if you've got a file, and no matter how long or complex, tap Generate Summary. Get the essentials in a breeze! Math solver, physics homework solver, essay writer, biology solver, chemistry solver—Solvo wears many hats! Yes, studies can be challenging, but with our AI homework helper, you're well-equipped to handle them! Get answers to all your problems—including tricky science answers—with prompt assistance for your tasks whenever and wherever you need it and enjoy studying with less anxiety. Be unstoppable in class with Premium! A subscription allows you to: • Remove usage limits • Get more detailed answers • Use text recognition (OCR) • Get instant responses Subscriptions are auto-billed based on the chosen plan. Privacy Policy - https://aiby.mobi/ai_study_ios/privacy Terms of Use - https://aiby.mobi/ai_study_ios/terms

Version 1.30

Get ready for the back-to-school season with Solvo! In this update: — Improved scanning and solving of visual tasks (including graphs, geometry, tables, and more) — Leave feedback after any solution, so we can continue improving task-solving — Copy and share any solution Don’t forget to send feedback to [email protected] and leave your review on the App Store! It helps us make the app even better.

Ratings and Reviews

179 Ratings

A wonderful app

Very helpful app I was needing something to help me with my daughter’s homework my daughter is horrible on taking notes in school. And if I have notes to see the task I’m good at figuring it out how to do the rest so I tried this help because I couldn’t find anything online to help me. So when this can’t up I was like why not. And I was glad I did it tells u how to solve it. And I could figure out the rest by their help. The only thing I would like if they make another app or add on this this one for younger kids. I know a couple of parents that also need help with there kid’s homework (how to help there child I don’t do it for my kids do there homework but I have to explain it to them sometimes and for that I need to refresh my mind as will) and this is a great app for that just hope they for something god younger students grades 2nd to 5th graders would help parents a lot.

Great App / One Major Issue

I love this app. Its saved me multiple times on upcoming tests, and the great thing about it is it thoroughly goes through the topic step-by-step making sure you understand how the AI got to the solution. All that to be said, I really wish there was a feature to edit the text that was scanned in the picture. I think its already an intended design because theres text displayed saying if you’d made typos heres the time to fix it, but it doesn't work. Tapping on the screen doesn't do anything. You can copy and paste the text but theres no way to edit it where the users keyboard opens. This is a 10/10 if I could edit the prompt.

Great academic support

Solvo has truly been a remarkable discovery for me as a busy working mom. My son has been facing difficulties with certain subjects in school, and finding the time and energy to assist him with homework has been a challenge for me. Since we found Solvo, everything has changed for the better. My son doesn’t give up on his assignments when they’re difficult. Solvo gives me peace of mind. I know my son receives the help he needs. The app has empowered my son to become more independent in tackling his academic challenges without unnecessary stress. I highly recommend Solvo to all working parents who want to actively support their children’s education. It’s an invention that has made a significant difference in our lives.

HAPPENING NOW

App privacy.

The developer, AIBY , indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

• Identifiers

Data Linked to You

The following data may be collected and linked to your identity:

• User Content
• Diagnostics

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Information

English, French, German, Italian, Malay, Portuguese, Spanish

• Weekly subscription $6.99
• Yearly subscription $39.99
• Yearly subscription $19.99
• 10 Requests $4.99
• 5 Requests $2.99
• Developer Website
• App Support
• Privacy Policy

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