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Question

Lichens show the symbiotic association between


A

Two Fungi

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B

Two Algae

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C

Fungus And Algae

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D

Fungus And Roots Of Higher Plants

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Solution

The correct option is C

Fungus And Algae


The correct option is C.

Explanation for correct option:

  1. Lichens show a symbiotic association between fungus and algae.
  2. Through photosynthesis, the algae help their fungal companion by creating organic food molecules.
  3. In exchange, the algae or cyanobacteria benefit from the fungal partner's protection and collection of moisture and nutrients from the environment.
  4. The mutualism between fungus and algae appears to be a symbiotic interaction (a relationship during which both organisms benefit).
  5. Some are extremely pollutant-sensitive and are utilized as environmental indicators.
  6. Lichens can be found on rocks, tree bark, walls, and other surfaces.

Explanation for incorrect options:

Option A:

  1. A symbiotic relationship is a close ecological link that exists between individuals of two (or more) distinct species.
  2. Therefore, such a relationship doesn't exist between the same species.
  3. Hence, two fungi will be the incorrect option.

Option B:

  1. A symbiotic relationship is a close ecological link that exists between individuals of two (or more) distinct species.
  2. Therefore, such a relationship doesn't exist between the same species.
  3. Hence, two algae will be the incorrect option.

Option D:

  1. Mycorrhiza is the symbiotic relationship between fungus and higher plant roots.
  2. The plant aids the fungus by supplying carbohydrates required for fungal growth, and the fungus helps the plant by expanding the root surface area.

Final answer: Lichens show the symbiotic association between fungus And algae.


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