In some plants, anthers and stigma grow and mature at same time. This phenomenon is called:

Options

A. Homogamy
B. Syngamy
C. Allogamy
D. Fusion

Answer

To answer the question regarding the phenomenon where anthers and stigma grow and mature at the same time, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- We need to analyze the given options: homogamy, syngamy, allogamy, and fusion.

2. **Defining Homogamy**:
- Homogamy refers to the maturation of both anthers (the male part of the flower that produces pollen) and stigma (the female part of the flower that receives pollen) at the same time. This ensures that the male and female gametes are available simultaneously for fertilization.

3. **Defining Syngamy**:
- Syngamy is the process of fusion of male and female gametes, resulting in the formation of a zygote. This term does not specifically refer to the timing of maturation of anthers and stigma.

4. **Defining Allogamy**:
- Allogamy refers to the fertilization of a flower by pollen from a different flower, which can be from the same species or a different species. This term is related to cross-pollination, not the simultaneous maturation of anthers and stigma.

5. **Defining Fusion**:
- Fusion generally refers to the merging of two nuclei, which is not relevant to the maturation of anthers and stigma.

6. **Conclusion**:
- Based on the definitions, the correct answer to the question is **homogamy**, as it specifically describes the phenomenon where both anthers and stigma mature at the same time.

### Final Answer:
The phenomenon where anthers and stigma grow and mature at the same time is called **homogamy**.