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.
You can also request for their pdf versions by emailing us at This email address is being protected from spambots. You need JavaScript enabled to view it. or contacting us via whatsapp @ +254 703 165 909
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.
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.
A: Biology is the study of life. Alternatively, you can say that Biology is the study of living organisms.
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.
A: Biology is a relatively easy subject to study, especially when one has good notes.
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.
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.
This is called an initial reading. Doing this ensures you know what will be taught in the biology class before the lesson begins.
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.
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.
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 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.
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;
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:
This topic covers various subtopics including:
This topic covers various subtopics including;
This topic covers various subtopics including;
This topic covers various subtopics including;
This topic covers various subtopics including;
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
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 :)
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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;
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 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
How to optimally use this page:
This topic covers various subtopics including:
This topic covers various subtopics including:
This topic covers various subtopics including:
This topic covers various subtopics including:
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.
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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;
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:
This topic covers various subtopics including:
This topic covers various subtopics including:
This topic covers various subtopics including:
This topic covers various subtopics including:
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.
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;
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
| Ions | Concentration in pond water (parts per million) | Concentration in cell sap (parts per million) |
| Sodium | 50 | 30 |
| Potassium | 2 | 150 |
| Calcium | 1.5 | 1 |
| Chloride | 180 | 200 |
|
Set -up |
|
Number of red blood cells |
|
|
|
Sodium chloride concentration |
At start of experiment |
At the end of the experiment |
|
A |
0.9% |
Normal |
No change in number |
|
B |
0.3% |
Normal |
Fewer in number |
| Nutrient | Food source | Role in the body |
| Vitamin A | ||
| Iron | ||
| Iodine | ||
| Vitamin D | ||
| Protein |
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;
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.
How to optimally use this page:
This topic covers various subtopics including:
This topic covers various subtopics including:
This topic covers various subtopics including:
This topic covers various subtopics including:
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.
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 biology topical revision questions with answers cover various topics, as shown below.
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.
Visit the EasyElimu App to get the answers to the topical revision questions for free.
Alternatively, click the blue download button on this page to download, in PDF format, the specific topical revision questions with answers
| Time of the day | Amount of sugar in grammes per 16 cm3 piece of bark | |
| Normal stem | Ringed stem | |
| 0645 | 0.78 | 0.78 |
| 0945 | 0.80 | 0.91 |
| 1245 | 0.81 | 1.01 |
| 1545 | 0.80 | 1.04 |
| 1845 | 0.77 | 1.00 |
| 2145 | 0.73 | 0.95 |
| 0045 | 0.65 | 0.88 |
| Component | Plasma | Glomerular | Urine Filtrate |
| Water Glucose Amino Acids Plasma proteins Urea In organic ions |
90 0.1 0.05 8.0 0.03 0.72 |
90 0.1 0.05 0 0.03 0.72 |
94 0 0 0 2.0 1.5 |
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 biology topical revision questions with answers cover various topics, as shown below.
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.
Visit the EasyElimu App to get the answers to the topical revision questions for free.
Alternatively, click the blue download button on this page to download, in PDF format, the specific topical revision questions with answers
| Class | Organisms | Reasons |
| Insecta | ||
| Myriapoda | ||
| Arachnida |
| Lakes | Mean body length (cm) | Type of water | Amount of plant life | Inveertebrate biomass (g/cm3) | |||
| Insects | Snails | Crabs | Worms | ||||
| A B C D |
31.2 28.6 18.4 16.3 |
Hard Hard Soft Soft |
1050 950 1.2 0.5 |
11 72 97 99 |
300 100 0 0 |
10 9 2 1 |
180 90 20 10 |
| Fish species | Fish population during the period | ||||||
| 1964 | 1966 | 1969 | 1970 | 1971 | 1972 | 1973 | |
| A B C D |
6102 208 36 4521 |
223 30 100 272 |
26 11 0 23 |
106 22 0 27 |
660 63 0 79 |
4071 311 0 400 |
7512 405 0 617 |
| Leaf | Number of stomata | |
| Upper epidermis | Lower epidermis | |
| A B C |
300 150 02 |
0 200 13 |
| Diet | Percentage of birds | |
| Forest | Savannah | |
| Insects only Vertebrates Seeds Fruits Other plant materials Number |
60 10 5 25 5 120 |
50 10 20 10 5 60 |
| Year | Month | Species A | Species B |
| 1998 1998 1998 1998 1998 1998 1998 1998 1998 1998 1998 1998 |
July August September October November December January February March April May June |
96 79 75 87 - 99 129 96 99 79 135 104 |
240 590 900 750 230 80 200 330 300 320 90 450 |
| Time (days) | Length of bbranches in mm | ||
| Shoot A | Shoot B | Shoot C | |
| 0 | 3 | 3 | 3 |
| 2 | 10 | 12 | 3 |
| 4 | 28 | 48 | 8 |
| 6 | 50 | 90 | 14 |
| 8 | 80 | 120 | 20 |
| 10 | 118 | 152 | 26 |
| Name hormone | Site of hormone production | Effect |
| Thyroid gland | ||
| Maturation of Graafin follicles | ||
| Auxins | ||
| Gibberellins |
| Dry mass of ingeminated seeds | Dry mass of seedling after 10 days | |
| Cellulose Starch Other organic Material Ash |
2g 63g 13g 2g |
5g 9g 27g 4g |
| Total dry mass | 80g | 45g |
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 biology topical revision questions with answers cover various topics, as shown below.
The form 4 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 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.
Visit the EasyElimu App to get the answers to the topical revision questions for free.
Alternatively, click the blue download button on this page to download, in PDF format, the specific topical revision questions with answers
| Hormone | Site of production | Function |
| Oestrogen | ||
| Aldosterone |
 |
 |
| Biceps | Gut muscles | |
| (i) (ii) (iii) (iv) |
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