Monoadelphous term is used to indicate

Options

A. anthers fused in a single group
B. filaments fused in a single group
C. both anthers and filaments fused in a single group
D. only one whorl of stamens in a flower

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Androsium**: The androsium is the male reproductive part of a flower, consisting of stamens. Each stamen is made up of an anther (the pollen-producing part) and a filament (the stalk that supports the anther).

2. **Cohesion in Stamens**: The stamens can exhibit varying degrees of cohesion. This means that the filaments and/or anthers can be fused together in different ways.

3. **Identifying Terms**:
- **Syngeneous**: This term refers to a condition where the anthers are fused together, but the filaments remain free. An example of this is found in sunflowers.
- **Monoadelphous**: This term indicates that the filaments of the stamens are fused together into a single group while the anthers remain free. This is the correct definition for the term "monoadelphous."
- **Synandrous**: This term describes a condition where both the filaments and anthers are fused together. An example of this can be found in plants from the Cucurbitaceae family, such as pumpkins and cucumbers.
- **Unisergate**: This term refers to the presence of only one whorl of stamens, which is not related to the cohesion of stamens.

4. **Conclusion**: Based on the definitions and examples provided, the term "monoadelphous" specifically refers to the condition where the filaments of the stamens are fused in a single group.

**Final Answer**: The term "monoadelphous" indicates that the filaments of the stamens are fused together in a single group.

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