Assertion :Endomycorrhiza of forest trees contribute to the efficient nutrient cycling in tropical forest ecosystems. Reason: The fungi that form endomycorrhizal associations with plants make nutrient ions available to them.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The fungi of endomycorrhiza invade the cells of the root cortex, with a portion lying externally as a loose mass of hyphae in the soil. Mycorrhiza causes considerable stimulation of growth in nutrient deficient soil. The greatest stimulation occurs in the uptake of phosphates. Mycorrhiza can take up phosphate at that low concentration at which they are unavailable to non-mycorrhizal roots.

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