Sporopollenin is found in :-

Options

A. Exine
B. Intine
C. Cytoplasm
D. Nucleus

Answer

**Step-by-Step Solution:**

1. **Understanding Pollen Grains**: Pollen grains are the male gametophytes in seed plants. They play a crucial role in the process of fertilization in flowering plants.

2. **Structure of Pollen Grains**: Pollen grains consist of two layers:
- The outer layer is known as the exine.
- The inner layer is called the intine.

3. **Composition of Exine**: The exine, which is the outermost layer of the pollen grain, is primarily composed of a unique and resilient substance known as sporopollenin.

4. **Properties of Sporopollenin**: Sporopollenin is one of the most durable organic materials. It is resistant to degradation by heat, enzymes, and acids, which makes it an excellent protective layer for pollen grains.

5. **Conclusion**: Given that sporopollenin is found in the exine of pollen grains, the correct answer to the question "Sporopollenin is found in:" is **exine**.

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