The tapetum is responsible for the nourishment of

Options

A. egg apparatus.
B. egg.
C. embryo.
D. pollens.

Answer

To solve the question regarding the role of the tapetum in plant biology, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of Anther**:
- The anther is a part of the stamen in flowering plants and is typically bilobed, meaning it has two lobes. Each lobe contains microsporangia.

2. **Identifying Microsporangia**:
- Each lobe of the anther contains two microsporangia, leading to a total of four microsporangia in a typical angiospermic anther (2 lobes x 2 microsporangia per lobe = 4 microsporangia).

3. **Layers of Microsporangium**:
- The microsporangium has four wall layers:
- **Epidermis** (outer layer)
- **Endothelium** (next layer)
- **Middle layers**
- **Tapetum** (innermost layer)

4. **Function of Tapetum**:
- The tapetum is responsible for the nourishment of developing pollen grains. It provides essential nutrients and support for the growth of pollen, which are the male gametes in plants.

5. **Conclusion**:
- Therefore, the tapetum is specifically responsible for nourishing the developing pollen grains within the microsporangia of the anther.

### Final Answer:
The tapetum is responsible for the nourishment of **pollen grains**.

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