Question

Given below are two statements:
Assertion (A): Stigmatic receptivity period does not coincide with pollen viability in monoecious plants which is known as dichogamy.
Reason (R): In dichogamy, self pollination prevented partially in perfect flowered plants due to maturity of sex elements at varied times.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Dichogamy prevents self-pollination by different timing of anther and stigma maturity.

Answer 1

The Correct Option is D

Concept:
Dichogamy is a floral mechanism in which male and female reproductive parts mature at different times.

Step 1: Check Assertion.
The assertion connects dichogamy specifically with monoecious plants. Dichogamy is more properly described as temporal separation of male and female function in flowers, especially perfect flowers. \[ A \text{ is not correctly stated} \]

Step 2: Check Reason.
In dichogamy, self-pollination is prevented or reduced because anthers and stigma mature at different times. \[ R \text{ is correct} \]

Step 3: Final conclusion.
Assertion is not correct, but Reason is correct. \[ \therefore \text{Correct Answer is (D)} \]