Cleistogamy does not require anthesis because

Options

A. No pollination agent is required
B. It assures heterozygosity
C. it allows xenogamy
D. it favours insect pollination.

Answer

### Step-by-Step Solution:

1. **Understanding Cleistogamy**:
- Cleistogamy is a phenomenon where flowers do not open. This means that the reproductive structures remain closed, preventing exposure to external pollinators.

2. **Self-Pollination**:
- In cleistogamous flowers, since the flowers do not open, they rely on self-pollination. This means that the pollen from the anthers of the same flower fertilizes the ovules, leading to seed formation without the need for pollen transfer from another flower.

3. **Understanding Anthesis**:
- Anthesis refers to the period when flowers are fully opened and ready for pollination. During this time, pollinators can access the flower to facilitate cross-pollination.

4. **Why Cleistogamy Does Not Require Anthesis**:
- Since cleistogamous flowers do not open, there is no need for the flowering period (anthesis) to occur. The closed flowers can still achieve fertilization through self-pollination without the involvement of pollinators.

5. **Evaluating the Options**:
- The question presents several options regarding why cleistogamy does not require anthesis. The correct answer is that no pollinating agent is required because the flowers are closed and self-pollination occurs.

### Final Answer:
Cleistogamy does not require anthesis because no pollinating agent is required.

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