The outermost and innnermost wall layers of microsporangium in an anther are respectively

Options

A. Endothecium and tapetum
B. Epidermis and endodermis
C. Epidermis and middle layer
D. Epidermis and tapetum

Explanation

To answer the question regarding the outermost and innermost wall layers of the microsporangium in an anther, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Microsporangium and Anther**:
- The microsporangium is a part of the anther, which is the male reproductive structure of flowering plants. The anther is part of the stamen, which is made up of two parts: the filament and the anther itself.

2. **Structure of the Anther**:
- The anther typically has a tetragonal shape (four corners) and is divided into two lobes. Each lobe contains microsporangia where pollen grains (microspores) are produced.

3. **Layers of the Microsporangium**:
- The microsporangium has several layers:
- **Outermost Layer**: The outermost layer of the microsporangium is called the **epidermis**. This layer serves as a protective barrier.
- **Innermost Layer**: The innermost layer is known as the **tapetum**. This layer provides nourishment to the developing microspores.

4. **Additional Layers**:
- Between the epidermis and the tapetum, there are other layers:
- The **endothelium**, which is located just beneath the epidermis.
- The **middle layer**, which consists of 2 to 3 layers of cells, lies between the endothelium and the tapetum.

5. **Conclusion**:
- Therefore, the outermost wall layer of the microsporangium is the **epidermis**, and the innermost wall layer is the **tapetum**.

### Final Answer:
The outermost wall layer of the microsporangium is the **epidermis**, and the innermost wall layer is the **tapetum**.

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