Diadelphous androecium has filaments fused in

Options

A. One group
B. Tow groups
C. Many groups
D. Two areas, upper and lower

Answer

To answer the question regarding the diadelphous androecium and the fusion of filaments, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding Diadelphous Condition**:
- The term "diadelphous" refers to a specific arrangement of stamens in flowering plants. In this condition, the filaments of the stamens are fused together.

2. **Analyzing the Fusion of Filaments**:
- In the diadelphous condition, the stamens are typically grouped into two distinct bundles. This means that the filaments are not completely free but are partially fused.

3. **Identifying the Number of Groups**:
- Since the filaments form two bundles, we can conclude that the correct answer to the question is that the filaments are fused in **2 groups**.

4. **Examining the Options**:
- Option 1 (1 group) is incorrect because diadelphous specifically indicates more than one group.
- Option 2 (2 groups) is correct as it aligns with the definition of diadelphous.
- Option 3 (many groups) is incorrect because it does not accurately describe the diadelphous condition.
- Option 4 (2 areas upper and lower) is misleading as it does not represent the correct grouping of the filaments.

5. **Conclusion**:
- Therefore, the correct answer is that in a diadelphous androecium, the filaments are fused in **2 groups**.