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NEETBotanyAnatomy of Flowering Plants

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In the vertical section of an isobilateral leaf, the vascular bundles are generally seen to be of near similar sizes. Reason (R): The near similar sizes of vascular bundles in isobilateral leaves is due to the presence of reticulate venation. In the light of the above statements, choose the correct

Options

  1. ABoth Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
  2. BBoth Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
  3. CAssertion (A) is true but Reason (R) is false.
  4. DAssertion (A) is false but Reason (R) is true.

Correct answer

C. Assertion (A) is true but Reason (R) is false.

Step-by-step solution

Assertion (A) is true because in isobilateral (monocotyledonous) leaves, the vascular bundles are generally of near similar sizes (except in main veins) as seen in vertical sections. Reason (R) is false because isobilateral leaves typically possess parallel venation, not reticulate venation. It is this parallel venation that is reflected in the near similar sizes of the vascular bundles. Reticulate venation is a characteristic of dicotyledonous (dorsiventral) leaves, where the vascular bundles vary greatly in size

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