Question

Which of the following characters is not required for autogamy?

• A. Flowers require synchrony in pollen release and stigma maturation.
• B. Anthers and stigma should lie close to each other.
• C. Flowers should be bisexual.
• D. Required pollination agents.

Hint:

Autogamy is the plant's "insurance policy." It ensures seed set even in the absence of pollinators, though it limits genetic variation compared to cross-pollination.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Autogamy is a type of self-pollination where pollen from the anther is transferred to the stigma of the same flower. For this to happen successfully without outside help, the flower must have specific structural and temporal adaptations.
Step 2: Detailed Explanation:
1. Synchrony (a): The pollen must be ready at the exact same time the stigma is receptive; otherwise, fertilization won't occur. This is required.
2. Proximity (b): The anther and stigma must be physically close so that pollen can simply fall or brush onto the stigma. This is required.
3. Bisexuality (c): Since autogamy happens within a single flower, that flower must possess both male (anther) and female (stigma) parts. This is required.
4. Pollination Agents (d): Autogamy is an independent process. Because the parts are so close and synchronized, these flowers do not require insects, wind, or water to move the pollen. In fact, many autogamous flowers (like cleistogamous flowers) never even open.
Step 3: Final Answer
Pollination agents are not required for autogamy.