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SS2: BIOLOGY - 2ND TERM

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  1. Mechanism of the Respiratory System | Week 1
    6 Topics
    |
    2 Quizzes
  2. Mechanism of Gaseous Exchange in Plants | Week 2
    1 Topic
    |
    1 Quiz
  3. Excretory Systems I | Week 3
    5 Topics
    |
    1 Quiz
  4. Excretory Systems II | Week 4
    4 Topics
    |
    3 Quizzes
  5. Nutrient Cycling in Nature I | Week 5
    3 Topics
  6. Nutrient Cycling in Nature II | Week 6
    2 Topics
    |
    1 Quiz
  7. Ecological Management | Week 7
    4 Topics
  8. Ecological Tolerance | Week 8
    2 Topics
    |
    1 Quiz
  9. Adaptation | Week 9
    3 Topics
    |
    1 Quiz
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Topic Content:

  • Meaning of Mutualism
  • Examples of Mutualism
    • Lichen
    • Protozoa in the Alimentary Canal of Termites
    • Micro-organisms in the Intestinal Tract of Ruminants
    • Mycorhizza
    • Rhizobium in the Roots of Leguminous Plants
    • Cattle and Tick Birds
    • Flowers and Pollinators

Mutualism is a close association between two organisms of different species which is beneficial to both of them.

Examples of mutualism:  

i. Lichen:

linchen
Linchen

A lichen is an organism that results from a mutualistic (symbiotic) relationship between a fungus and a photosynthetic organism. The other organism is usually a cyanobacterium or green alga. An example of lichen is Trebouxia and ascomycete fungi.

 

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