Assertion :In lichens, mycobiont and phycobiont are symbiotically associated in which algae is predominant and fungi is a subordinate partner. Reason: The fungus provides food and alga protects the fungus from unfavourable conditions.

If both assertion and reason are true and reason is the correct explanation of assertion.

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If both assertion and reason are true but reason is not the correct explanation of assertion.

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If assertion is true but reason is false.

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If both assertion and reason are false.

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Solution

The correct option is D If both assertion and reason are false.
A lichen is an organism that results from a mutualistic relationship between a fungus and an alga. The fungus grows around the algal cells. The fungus benefits from the constant supply of food produced by the photosynthesizer algal part. The photosynthesizer benefits from the water and nutrients absorbed by the fungus.
Thus both the assertion and the reason are false.
So, the correct answer is (D).

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