Assertion: Tendril of grapevine is a stem modification.
Reason: Tendril of grapevine is demarcated into nodes and internodes.

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Assertion and reason are correct and reason explains the assertion.

Assertion and reason are correct and reason can not explain the assertion.

Assertion is correct and reason is incorrect

Assertion is incorrect and reason is correct

answer is C.

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Detailed Solution

Tendrils of grapevine are modified aerial axillary buds (actually terminal buds). But they are not demarcated into nodes and internodes. Such modified stems which externally loose their stem identity are called metamorphosed stems.

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