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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:

  • Aphids
  • Grasshoppers

Aphids:

Aphids have a complicated life cycle. Wingless females are known as “stem mothers” can reproduce without fertilization (parthenogenesis). The mouthparts of aphids are modified for piercing and sucking.

They obtain their food by sucking plant juices or the blood of other animals. e.g water boatman prey on other pond creatures e.g frogs while “cuckoo-spit” insects draw fluids from plants. These groups of insects have an incomplete metamorphosis, there is no pupal stage but a series of moults in which the nymph gradually becomes a mature adult.

 

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