Intine of pollen grain is made of

Options

A. sporopollenin
B. pecto celluslose
C. silica and cellulose
D. only celluslose

Answer

To answer the question "Intine of pollen grain is made of," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Pollen Grain Structure**:
- Pollen grains consist of two main layers: the outer layer called the exine and the inner layer known as the intine.

2. **Identifying the Intine**:
- The intine is the inner covering of the pollen grain. It is crucial to differentiate it from the exine, which is the outer layer.

3. **Composition of Intine**:
- The intine is primarily composed of two substances: pectin and cellulose. Together, these components form a material known as pectocellulose.

4. **Evaluating the Options**:
- Given the options:
- a) Asporopolyanine: This is incorrect as it is a component of the exine.
- b) Pectocellulose: This is correct as it accurately describes the composition of the intine.
- c) Silica: This is incorrect as silica is not found in the intine.
- d) Only cellulose: This is incorrect because the intine is made of both pectin and cellulose, not just cellulose.

5. **Conclusion**:
- The correct answer to the question is that the intine of pollen grain is made of **pectocellulose**.