In most of the angiosperms , the mature anther at the time of dehiscence has

Options

A. two lobes and four pollen sacs
B. one lobe and two pollen sac
C. two lobes and one pollen sac
D. two lobes and two pollen sacs

Answer

To solve the question regarding the structure of the mature anther at the time of dehiscence in most angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Anther**:
- The anther is part of the stamen in flowering plants (angiosperms) and is responsible for producing pollen.

2. **Identify the Characteristics of a Young Anther**:
- A young anther is typically bilobed, meaning it has two lobes. Each lobe contains two pollen sacs, making a total of four pollen sacs. This structure is referred to as "dithecus".

3. **Transition to Mature Anther**:
- As the anther matures and reaches the stage of dehiscence (the process of releasing pollen), the structure changes.

4. **Analyze the Mature Anther**:
- At the time of dehiscence, each of the two lobes of the anther retains one pollen sac. Thus, the mature anther has a total of 2 lobes and 2 pollen sacs.

5. **Evaluate the Options**:
- **Option 1**: 2 lobes and 4 pollen sacs - Incorrect for mature anther.
- **Option 2**: 1 lobe and 2 pollen sacs - Incorrect.
- **Option 3**: 2 lobes and 1 pollen sac - Incorrect for most angiosperms.
- **Option 4**: 2 lobes and 2 pollen sacs - Correct.

6. **Conclusion**:
- The correct answer is that in most angiosperms, the mature anther at the time of dehiscence has **2 lobes and 2 pollen sacs**.