Select incorrect statement for male gametophyte in angiosperms?

Options

A. Pollen tube is formed by intine
B. Male gametes are non motile
C. Tube nucleus divides to form sperms
D. Generative cell is smaller than tube cell

Answer

To determine the incorrect statement regarding male gametophytes in angiosperms, we will analyze each of the provided statements one by one.

### Step-by-Step Solution:

1. **Understanding Male Gametophyte**:
- In angiosperms, the male gametophyte is represented by the pollen grain. It consists of two main parts: the generative cell and the tube cell.

2. **Analyzing the Statements**:
- **Statement 1**: "Pollen tube is formed by entines."
- This statement is **correct**. The inner layer of the pollen grain, known as the entine, is responsible for the formation of the pollen tube during fertilization.

- **Statement 2**: "Male gametes are non-motile."
- This statement is also **correct**. In angiosperms, the male gametes (sperms) are non-motile and are transported to the ovule via the pollen tube.

- **Statement 3**: "Tube nucleus divides to form sperms."
- This statement is **incorrect**. The sperms are produced by the division of the generative cell, not the tube nucleus. The tube nucleus is involved in the formation of the pollen tube.

- **Statement 4**: "Generative cell is smaller than the tube cell."
- This statement is **correct**. The generative cell is indeed smaller than the tube cell in the pollen grain structure.

3. **Conclusion**:
- The incorrect statement regarding male gametophytes in angiosperms is **Statement 3**: "Tube nucleus divides to form sperms."

### Final Answer:
The incorrect statement for male gametophyte in angiosperms is: **"Tube nucleus divides to form sperms."**