Inner layer of male gametophyte in Angiosperm is mainly composed of

Options

A. Polymer of amino acids
B. Polymer of nucleotide
C. Polymer of lipid
D. Polymer of carbohydrate

Answer

To solve the question regarding the composition of the inner layer of the male gametophyte in angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Male Gametophyte**:
- The male gametophyte in angiosperms is known as pollen grains.

2. **Understand the Structure of Pollen Grains**:
- Pollen grains have two layers: an outer layer called the exine and an inner layer called the intine.

3. **Focus on the Inner Layer (Intine)**:
- The inner layer (intine) is primarily composed of cellulose and hemicellulose.

4. **Identify the Composition of Cellulose**:
- Cellulose is a polysaccharide made up of glucose units.

5. **Determine the Type of Polymer**:
- Since cellulose is made from glucose, and glucose is a type of carbohydrate, we conclude that the inner layer of the male gametophyte is composed of a polymer of carbohydrates.

6. **Evaluate the Options**:
- The options provided were:
- Polymer of amino acids (incorrect)
- Polymer of nucleotides (incorrect)
- Polymer of lipids (incorrect)
- Polymer of carbohydrates (correct)

7. **Final Conclusion**:
- The correct answer is that the inner layer of the male gametophyte in angiosperms is mainly composed of a polymer of carbohydrates.