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Question
Assertion (A): Mycorrhizae are symbiotic associations between fungi and cyanobacteria.
Reason (R): Cyanobacteria are photosynthetic nitrogen fixers and so increase the efficiency of fungi.
Options
Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.
Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.
Assertion (A) is true but reason (R) is false.
Both assertion (A) and reason (R) are false.
MCQ
Assertion and Reasoning
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Solution
Both statements are false. Mycorrhizae are associations between fungi and plant roots, not fungi and cyanobacteria; cyanobacteria do not define or increase the efficiency of mycorrhizae.
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