Choose the correct statement from the following.

Options

A. Cleistogamous flowers always exhibit autogamy
B. Chasmogamous flowers always exhibit geitonogamy
C. Cleistogamous flowers exhibit both autogamy and geitonogamy
D. Chasmogamous flowers never exhibit autogamy

Explanation

To solve the question regarding which statement is correct about clistogamous and chasmogamous flowers, we need to analyze the definitions and characteristics of these terms. Here’s a step-by-step breakdown:

### Step-by-Step Solution:

1. **Understand Key Terms**:
- **Autogamy**: This is a form of self-pollination where the pollen from the anther of a flower fertilizes the stigma of the same flower.
- **Gytanogamy**: This refers to cross-pollination, where pollen from one flower fertilizes the stigma of another flower, which can be from the same plant or a different plant.

2. **Identify Flower Types**:
- **Clistogamous Flowers**: These flowers do not open, meaning their anthers and stigmas are not exposed. As a result, they primarily engage in self-pollination (autogamy) since there is no opportunity for cross-pollination.
- **Chasmogamous Flowers**: These flowers open up, allowing their anthers and stigmas to be exposed. This enables both self-pollination (autogamy) and cross-pollination (gytanogamy) depending on environmental conditions.

3. **Evaluate Each Option**:
- **Option 1**: "Clistogamous flowers always exhibit autogamy."
- This is correct because clistogamous flowers cannot cross-pollinate due to their closed structure.
- **Option 2**: "Chasmogamous flowers always exhibit gytanogamy."
- This is incorrect because chasmogamous flowers can also self-pollinate.
- **Option 3**: "Clistogamous flowers exhibit both autogamy and gytanogamy."
- This is incorrect because clistogamous flowers cannot engage in cross-pollination.
- **Option 4**: "Chasmogamous flowers never exhibit autogamy."
- This is incorrect because chasmogamous flowers can self-pollinate.

4. **Conclusion**:
- The only correct statement is **Option 1**: "Clistogamous flowers always exhibit autogamy."

### Final Answer:
The correct statement is: **Clistogamous flowers always exhibit autogamy.**

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