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Standard XII

Biology

Theories of Origin of Life

Assertion :Se...

Question

Assertion :Senescence is delayed by the application of cytokinin in plants. Reason: Cytokinin prevents the breakdown of chlorophyll, proteins and nucleic acid.

If both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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If both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion

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If Assertion is correct but Reason is incorrect.

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If Assertion is incorrect but Reason is correct.

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Solution

The correct option is A If both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Senescence is plants is caused by the breakdown of chlorophyll, proteins and nucleic acids. Cytokinin mitigates this breakdown, thereby preventing senescence. Thus, both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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