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SS1: BIOLOGY - 2ND TERM

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  1. Cellular Respiration | Week 1
    5 Topics
    |
    1 Quiz
  2. Excretion & Growth in Living Cells | Week 2
    4 Topics
    |
    1 Quiz
  3. Irritability | Week 3
    6 Topics
    |
    1 Quiz
  4. Reproduction of Organisms | Week 4
    5 Topics
    |
    1 Quiz
  5. Tissues and Supporting Systems | Week 5
    6 Topics
    |
    1 Quiz
  6. Animal Nutrition | Week 6
    6 Topics
    |
    1 Quiz
  7. Enzymes | Week 7
    1 Topic
    |
    1 Quiz
  8. Heterotrophic Nutrition | Week 8
    3 Topics
    |
    1 Quiz
  9. The Mammalian Dentition | Week 9
    3 Topics
    |
    1 Quiz
  10. Basic Ecological Concepts | Week 10
    3 Topics
    |
    1 Quiz
  11. Local Biotic Communities | Week 11
    4 Topics
    |
    1 Quiz
  12. Major Biomes of the World | Week 12
    5 Topics
    |
    1 Quiz



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Topic Content:

  • Growth of Living Organisms
  • Basis of Growth
  • Cell Division
    • Mitosis
    • Meiosis
  • Cell Enlargement & Cell Differentiation

Growth is defined as a permanent or irreversible increase in dry weight, size, mass or volume of a cell, organ or organism due to the addition of living protoplasmic materials.

For growth to occur, the rate of building up of materials (anabolism) must exceed the rate of breaking down or catabolism.

Basis of Growth:

For any organism to grow it must pass through these phases;

(i) Cell division
(ii) Cell enlargement
(iii) Cell differentiation

Cell division: (Cell multiplication) In order for a cell to multiply, it has to undergo cell division. Mitosis & Meiosis.

 

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