Determine the statement that is not related to sporopollenin .

Options

A. The hard outer layer of pollen grain is called exine which is made up of sporopollenin.
B. It is one of the most resistant organic material which is produced by endothecium
C. No enzyme is known yet which degrades sporopollenin.
D. It can withstand high temperature and strong and alkali.

Answer

To determine the statement that is not related to sporopollenin, we need to analyze each option provided in the question.

1. **Option A**: "The outer hard layer of pollen grain is called enzyme which is made up of sporopollenin."
- This statement is partially correct. The outer hard layer of pollen grains is called the exine, and it is indeed made up of sporopollenin. However, the term "enzyme" is incorrect in this context. The correct term should be "exine." Therefore, this statement is misleading but not entirely unrelated.

2. **Option B**: "It is one of the most resistant organic matter which is produced by endothelium."
- This statement is incorrect. Sporopollenin is indeed one of the most resistant organic materials, but it is produced by the sporogenous tissue (specifically, the microsporangium) and not by the endothelium. Therefore, this statement is not related to sporopollenin.

3. **Option C**: "No enzyme is known yet which degrades sporopollenin."
- This statement is true. Sporopollenin is known for its chemical stability and resistance to degradation by enzymes, making this statement related to sporopollenin.

4. **Option D**: "It can withstand high temperature and strong alkaline."
- This statement is also true. Sporopollenin is known for its ability to withstand extreme conditions, including high temperatures and strong alkaline environments, making this statement related to sporopollenin.

After analyzing all the options, the statement that is not related to sporopollenin is **Option B**: "It is one of the most resistant organic matter which is produced by endothelium."

### Summary of Steps:
1. Read and analyze each statement regarding sporopollenin.
2. Identify the correct and incorrect aspects of each statement.
3. Determine which statement does not accurately relate to sporopollenin.
4. Conclude that Option B is the answer.