The term used when anthers and stigma of an intersexual or perfect flower ripen before the opening of buds as in wheat and pea is

Options

A. Bud pollination
B. Immature pollination
C. Cleistogamy
D. Self pollination

Answer

To solve the question regarding the term used when the anthers and stigma of an intersexual or perfect flower ripen before the opening of buds, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- First, we need to understand what is meant by "intersexual" or "perfect flower." A perfect flower is one that contains both male (anthers) and female (stigma) reproductive parts.

2. **Identifying the Process**:
- The question refers to a situation where the anthers and stigma mature before the flower bud opens. This means that pollination occurs while the flower is still in bud form.

3. **Analyzing the Options**:
- We have four options to consider:
- **Bud Pollination**: This refers to pollination that occurs while the flower is still in bud form, where both the anthers and stigma are mature.
- **Immature Pollination**: This would imply that the anthers are not mature enough to produce pollen, which does not fit the scenario.
- **Calistogamy**: This term refers to pollination that occurs in closed flowers, but it does not specifically indicate that the anthers and stigma mature before the flower opens.
- **Self-Pollination**: This occurs when pollen from the anthers of a flower fertilizes its own stigma, but it does not specify the timing of maturation.

4. **Selecting the Correct Answer**:
- Given the definitions and the context, the correct term for when the anthers and stigma ripen before the flower bud opens is **Bud Pollination**.

5. **Conclusion**:
- Therefore, the answer to the question is **Bud Pollination**.