Sporopollenin is part of

Options

A. Pollen grain covering
B. Oosphere covering
C. Ovule covering
D. Cell wall.

Answer

**Step-by-Step Solution:**

1. **Understanding Sporopollenin**: Sporopollenin is a type of polymer that is known for its chemical stability and resistance to degradation.

2. **Identifying Its Function**: Sporopollenin is primarily found in the outer walls of spores and pollen grains. Its main role is to protect the male gametes during their transport and ensure their survival in various environmental conditions.

3. **Analyzing the Options**:
- **Polyamide covering**: This is not a term typically associated with sporopollenin.
- **Oosphere covering**: Oosphere refers to the female gamete, and sporopollenin is not part of it.
- **Ovule covering**: Ovules are part of the female reproductive structure, and sporopollenin does not play a role here.
- **Cell wall**: While cell walls are important for plant structure, sporopollenin is not a component of the cell wall.

4. **Conclusion**: The correct answer is that sporopollenin is part of the **pollen grain covering**. It forms the outer layer (exine) of pollen grains, which carry the male gametes.

**Final Answer**: Sporopollenin is part of the pollen grain covering.

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