In bisexual flowers when the gynoecium matures earlier than the androecium, it is called

Options

A. heterogamy
B. autogamy
C. protogyny
D. protandry

Answer

To solve the question "In bisexual flowers when the gynoecium matures earlier than the androecium, it is called," we need to analyze the terms related to flower maturation and reproductive structures.

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Gynoecium**: This is the female reproductive part of the flower, which includes the ovary, style, and stigma.
- **Androecium**: This is the male reproductive part of the flower, which includes the stamens (anthers and filaments).

2. **Identify the Maturation Process**:
- The question states that the gynoecium matures earlier than the androecium. This means that the female parts of the flower are ready for fertilization before the male parts are ready to release pollen.

3. **Examine the Options**:
- **Heterogamy**: This refers to plants having different types of flowers (not relevant here).
- **Autogamy**: This means self-pollination (not relevant here).
- **Protogyny**: This is when the female parts mature before the male parts (this matches our condition).
- **Protandry**: This is when the male parts mature before the female parts (not relevant here).

4. **Conclusion**:
- Since the question specifies that the gynoecium matures earlier than the androecium, the correct answer is **Protogyny**.

### Final Answer:
**Protogyny**