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; 

  1. Classification 2
  2. Ecology
  3. Reproduction in plants and animals
  4. 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.

Chapter 1: Summarized notes on classification 2

This topic covers various subtopics including:

  • General Principles of Classification
  • Binomial Nomenclature
  • General Characteristics of Kingdoms
    • Kingdom Monera
    • Kingdom Protoctista
    • Kingdom Fungi
  • Kingdom Plantae
    • Division Bryophyta
    • Division Pteridophyta
    • Division Spermatophyta
  • Kingdom Animalia
    • Phylum Arthropoda
    • Phylum Chordata
  • Construction and Use of Dichotomous Keys 
    • Rules Used to Construct a Dichotomous Key
    • Some Common Features Used for Identification
  • Practical Activities
    • To Examine Bryophyta
    • To Examine Pteridophyta
    • To Examine Spermatophyta
    • Examination of Arthropoda
    • Examination of Chordata

Chapter 2: Summarized notes on ecology

This topic covers various subtopics including:

  • Introduction
  • Concepts and Terms Used in Ecology
    • Habitat
    • Niche
    • Population
    • Dispersion
    • Community
    • The Ecosystem
    • Biomass
    • Carrying Capacity
  • Factors in an Ecosystem
    • Abiotic Factors (Environmental Factors)
    • Biotic Factors
  • Inter-relationships Between Organisms
    • Producers:
    • Consumers
    • Competition
    • Predation
    • Saprophytism
    • Parasitism
    • Symbiosis
    • Nitrogen Cycle
  • Energy Flow in an Ecosystem
    • Food Chains
    • Food Web
    • Decomposers
    • Pyramid of Numbers
    • Pyramid of Biomass
  • Population Estimation Methods
    • Quadrat Method
    • Line Transect
    • Belt Transect
    • Capture-recapture Method
  • Adaptations of Plants to Various Habitats
    • Xerophytes
    • Mesophytes
    • Hydrophytes (Water Plants)
    • Halophytes (Salt Plants)
  • Pollution
    • Effects and Control of causes of Pollutants in Air, Water and Soil
  • Human Diseases
    • Bacterial Diseases
    • Protozoa Diseases
    • Parasitic Diseases 
  • Practical Activities
    • 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

This topic covers various subtopics including:

  • Introduction
  • Cell Division
    • Mitosis
    • Meiosis
  • Asexual Reproduction
  • Types of Asexual Reproduction.
  • Sexual Reproduction in Plants
    • Structure of a Flower
    • Pollination
    • Fertilisation in Plants
    • Fruit Formation
    • Placentation
    • Methods of Fruit and Seed Dispersal
  • Reproduction in Animals
    • 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
  • Practical Activities

Chapter 4: Summarized notes on growth and development

This topic covers various subtopics including:

  • Concept of Growth and Development
  • Measurement of Growth
    • Lag Phase (slow growth)
    • Exponential Phase (log phase)
    • Decelerating Phase
    • Plateau Phase
  • Growth and Development in Plants
    • 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
  • Growth and Development in Insects
    • 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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