Which of the following statements about sporopollenin is incorrect ?

Options

A. Exine is made up of sporopollenin
B. Sporopollenin is one of the resistant organic materials
C. Exine gas apertures called germ pores where sporopollenin is present
D. Sporopollenin can withstand high temperatures and strong acids.

Explanation

To determine which statement about sporopollenin is incorrect, let's analyze each option step by step:

1. **Understanding Sporopollenin**: Sporopollenin is a complex organic polymer that is a major component of the outer layer of pollen grains, known as the exine. It is known for its durability and resistance to various environmental factors.

2. **Analyzing the Options**:
- **Option A**: "Exine is made up of sporopollenin."
- This statement is **correct**. The exine, which is the outer layer of the pollen grain, is indeed composed of sporopollenin.

- **Option B**: "Sporopollenin is one of the resistant organic materials."
- This statement is also **correct**. Sporopollenin is known for its resistance to degradation, making it one of the most durable organic materials found in nature.

- **Option C**: "Exine has apertures called germ pores where sporopollenin is present."
- This statement is **incorrect**. While exine does have germ pores, sporopollenin is not present at these apertures. The germ pores are areas where the exine is thinner, allowing for pollen tube emergence, but sporopollenin itself is not found here.

- **Option D**: "Sporopollenin can withstand high temperatures and strong acids."
- This statement is **correct**. Sporopollenin is known for its ability to withstand extreme conditions, including high temperatures and strong acids.

3. **Conclusion**: Based on the analysis, the incorrect statement about sporopollenin is **Option C**.

### Summary of the Solution:
- The correct answer is **Option C**: "Exine has apertures called germ pores where sporopollenin is present." This statement is incorrect because sporopollenin is not present at the germ pores.