Assertion :In a girdled plant, roots begin to perform protoplasmic respiration. Reason: Protoplasmic respiration occurs only under starvation conditions.

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
Girdling is the process of removal of a ring of outer tissue till the phloem layer, in a trunk. Phloem is responsible for the downward movement of food. This downward movement stops in a girdled plant. Hence, roots face starvation condition. They die first due to lack of food. When proteins are used as respiratory fuels instead of carbohydrates and fat, the process is called as protoplasmic respiration. Roots show protoplasmic respiration under the starvation condition.
Thus, the correct answer is option A.

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