Which function of tapetum is correct ?

Options

A. Helps in pollen wall formation
B. Transportation of nutrients to inner side of anther
C. Synthesis of callase enzyme for separation of microspore tetrads
D. All of these

Answer

### Step-by-Step Solution:

1. **Understanding Tapetum**:
- The tapetum is a specialized layer of nutritive cells found within the anthers of flowering plants. It plays a crucial role in the development of pollen grains.

2. **Functions of Tapetum**:
- **Nutrition and Development of Pollen Grains**: The tapetum provides essential nutrients that are necessary for the growth and development of pollen grains.
- **Formation of Pollen Wall**: The tapetum is involved in the formation of the pollen wall, which is essential for protecting the pollen grains.
- **Synthesis of Callose Enzyme**: The tapetum synthesizes callose enzyme, which is important for the separation of microspore tetrads. Microspore tetrads are clusters of four cells that are held together by a substance called callose.

3. **Evaluating the Options**:
- **Option A**: Tapetum helps in the formation of the pollen wall - This is correct.
- **Option B**: Tapetum transports nutrients to the inner side of the anther - This is also correct as it aids in the nutrition and development of pollen grains.
- **Option C**: Tapetum synthesizes callose enzyme for the separation of microspore tetrads - This is correct as well since the callose enzyme helps dissolve the callose substance that holds the tetrads together.

4. **Conclusion**:
- All the provided options regarding the functions of the tapetum are correct. Therefore, the right answer to the question is **Option D**: All of the above.