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SS3: BIOLOGY - 1ST TERM

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  1. Regulation of Internal Environment I
    6 Topics
    |
    1 Quiz
  2. Regulation of Internal Environment II
    4 Topics
    |
    1 Quiz
  3. Regulation of Internal Environment III | Week 2 (Contd)
    3 Topics
    |
    1 Quiz
  4. Nervous Coordination I
    2 Topics
    |
    1 Quiz
  5. Nervous Coordination II
    4 Topics
    |
    1 Quiz
  6. Sense Organs I
    6 Topics
    |
    1 Quiz
  7. Sense Organs II
    3 Topics
    |
    1 Quiz
  8. Ecology of Population
    3 Topics
    |
    1 Quiz
  9. Balance in Nature
    3 Topics
    |
    1 Quiz
  10. Reproductive Systems and Reproduction in Man I
    4 Topics
    |
    1 Quiz
  11. Reproductive Systems and Reproduction in Man II
    3 Topics
    |
    1 Quiz
  12. Development of New Seeds
    4 Topics
    |
    1 Quiz
  13. Fruits
    3 Topics
    |
    1 Quiz

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SS3: BIOLOGY – 1ST TERM Development of New Seeds Structure and Types of Seeds
Lesson 12, Topic 2
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Structure and Types of Seeds

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Topic Content:

  • Structure and Types of Seeds
  • Development of Seed (Changes that Accompany Development of Seed in the Ovule)

Fruit and seeds are the products of pollination and fertilization. The seed develops from the ovule after fertilization. 

  • A seed consists of the embryo and one or two cotyledons, some contain endosperm or food reserve from the nourishment of the embryo. 
seed
  • The embryo is made up of the radicle (future root system) and plumule (future shoot system).
embryo

The seed is a potential plant waiting for favourable conditions to germinate. 

Flowering plants are of two types based on the number of cotyledons. Monocotyledons (one cotyledon) 

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