Which of the following is false about xenogamy?

Options

A. It is the transfer of pollen grains from antehr to stigma of another plant of the same species
B. It produces genetic variation
C. It ils genetically and ecologically (=functionally) cross pollination.
D. It occurs in cleistogamous flowers

Answer

To determine which statement about xenogamy is false, we need to analyze each of the provided statements regarding this form of pollination.

### Step-by-step Solution:

1. **Understanding Xenogamy**:
- Xenogamy is a type of pollination also known as cross-pollination. It involves the transfer of pollen grains from the anther of one flower to the stigma of another flower on a different plant of the same species.

2. **Evaluating Each Statement**:
- **Statement 1**: "It is a transfer of pollen grain from anther to stigma of another plant of the same species."
- This statement is **true** as it accurately describes xenogamy.

- **Statement 2**: "It produces genetic variation."
- This statement is also **true** because cross-pollination involves two different plants, which leads to greater genetic diversity in the offspring.

- **Statement 3**: "It is genetically and ecologically cross-pollination."
- This statement is **true** as xenogamy is indeed a form of cross-pollination, which is both genetically and ecologically significant.

- **Statement 4**: "It occurs in Cleistogamous flowers."
- This statement is **false**. Cleistogamous flowers are those that remain closed and do not open, which means they can only undergo self-pollination. Since xenogamy involves cross-pollination between different plants, it cannot occur in cleistogamous flowers.

3. **Conclusion**:
- The false statement regarding xenogamy is **Statement 4**: "It occurs in Cleistogamous flowers."