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SS2: BIOLOGY - 1ST TERM

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  1. Classification of Plants | Week 1
    3 Topics
    |
    2 Quizzes
  2. Digestive System I | Week 2
    4 Topics
    |
    1 Quiz
  3. Digestive System II | Week 3
    4 Topics
    |
    1 Quiz
  4. Transport System I | Week 4
    5 Topics
    |
    1 Quiz
  5. Transport System II | Week 5
    3 Topics
  6. Transport System III | Week 6
    1 Topic
  7. Mechanism of Transportation in Higher Animals | Week 7
    3 Topics
    |
    1 Quiz
  8. Transport in Plants | Week 8
    2 Topics
  9. Experiment to Demonstrate the Flow of Materials in Plants | Week 9
    2 Topics
    |
    1 Quiz
  10. Respiratory System | Week 10
    2 Topics



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Topic Content:

  • Transports of Mineral Salt and Water
  • Transport of Manufactured Food

1. Transports of Mineral Salt and Water:

i. Osmosis is involved in the absorption of mineral salts and water, it occurs in the zone of the root hairs. Water moves from the root hairs to the xylem cells in the vascular bundles.

ii. Active Transport: The absorption of mineral salts into the root hairs is by active transport. The concentration of mineral salts in the soil water is lower than that of the cells sap of the root hairs thereby facilitating the movement into the root hairs. Mineral salts and ions are absorbed against a concentration gradient. The energy needed for this process is provided by cellular respiration. 

 

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