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SS2: BIOLOGY - 3RD TERM

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  1. Pollution | Week 1
    3 Topics
  2. Pollution II | Week 2
    3 Topics
    |
    1 Quiz
  3. Conservation of Natural Resources | Week 3
    6 Topics
    |
    1 Quiz
  4. Pests and Diseases of Crops | Week 4
    4 Topics
  5. Control of Pests | Week 5
    3 Topics
    |
    1 Quiz
  6. Reproductive System in Vertebrates I | Week 6
    5 Topics
    |
    1 Quiz
  7. Reproductive System in Vertebrates II (Mammals)| Week 7
    4 Topics
    |
    1 Quiz
  8. Reproductive System in Vertebrates III (Comparison of Reproduction in Vertebrates) | Week 8
    4 Topics
    |
    1 Quiz
  9. Reproductive System in Plants | Week 9
    2 Topics
    |
    1 Quiz
  10. Pollination in Plants | Week 10
    4 Topics
    |
    1 Quiz



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Topic Content:

  • Meaning of Self-Pollination
  • Advantages of Self-Pollination
  • Disadvantages of Self-Pollination
  • Features of Self-Pollinated Flowers
  • Conditions that Favour Self-Pollination

What is Self-Pollination?

Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. 

Advantages of Self-Pollination:

1. Self-pollinated flowers produce pollen grains in small quantities.

2. Pollination is more certain to occur as it does not involve distance once the pollen grains are mature.

Disadvantages of Self-Pollination:

1. Seeds produced are less healthy than seeds produced by cross-pollination.

 

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