In anther wall, which of the following constitutes third layer from outside?

Options

A. Endothecium
B. Endothelium
C. Aleurone layer
D. Middle layers

Answer

To answer the question regarding the third layer from the outside in the anther wall, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Anther**: The anther is a crucial part of the stamen in flowering plants, responsible for producing pollen (male gametes). It consists of several layers.

2. **Identify the Layers of the Anther Wall**: The anther wall is composed of four distinct layers:
- **Epidermis**: This is the outermost layer.
- **Endodermis**: This is the second layer.
- **Middle Layer**: This is the third layer.
- **Tapetum**: This is the innermost layer.

3. **Determine the Third Layer**: Based on the order of the layers:
- 1st Layer: Epidermis
- 2nd Layer: Endodermis
- 3rd Layer: Middle Layer
- 4th Layer: Tapetum

4. **Conclusion**: Therefore, the third layer from the outside in the anther wall is the **Middle Layer**.

### Final Answer:
The third layer from the outside in the anther wall is the **Middle Layer**.

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