Number of prothallial cells presnet in the male gametophyte of angiosperms is

Options

A. one
B. Two
C. many
D. zero.

Answer

To solve the question regarding the number of prothallial cells present in the male gametophyte of angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**:
- Prothallial cells are vegetative cells found in the male gametophyte of certain plants. They are particularly noted in gymnosperms.

2. **Identify the Plant Groups**:
- Angiosperms (flowering plants) and gymnosperms (non-flowering plants) are two major groups of seed plants.

3. **Characteristics of Prothallial Cells**:
- In gymnosperms, prothallial cells are present as part of the male gametophyte. They are sterile cells that accompany the antheridial cells, which develop into generative and tube cells.

4. **Determine Presence in Angiosperms**:
- In angiosperms, the structure of the male gametophyte is different. The male gametophyte typically consists of only two cells: the generative cell and the tube cell, with no prothallial cells present.

5. **Conclusion**:
- Since prothallial cells are not present in the male gametophyte of angiosperms, the number of prothallial cells in angiosperms is zero.

### Final Answer:
The number of prothallial cells present in the male gametophyte of angiosperms is **zero**.

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