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Asseration : In lichens, mycobiont and p...

Asseration : 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.

A

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

B

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

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Assertion**: The assertion states that in lichens, the mycobiont (fungus) and phycobiont (alga) are symbiotically associated, with algae being the predominant partner and fungi being the subordinate partner. 2. **Analyzing the Relationship**: In lichens, the relationship is mutualistic. The fungus (mycobiont) surrounds and protects the algal cells (phycobiont), while the algae perform photosynthesis to produce food. 3. **Evaluating the Reason**: The reason given states that the fungus provides food and the alga protects the fungus from unfavorable conditions. This is incorrect because it is actually the algae that provide food (through photosynthesis) to the fungus, while the fungus provides protection and absorbs water and nutrients for the algae. 4. **Determining the Truth of Assertion and Reason**: - The assertion is false because it incorrectly states the roles of the partners in the symbiotic relationship. - The reason is also false because it reverses the roles of the fungus and algae regarding food production and protection. 5. **Conclusion**: Since both the assertion and the reason are false, the correct answer is that both the assertion and reason are false. ### Final Answer: Both the assertion and reason are false.
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