In angiosperms microspores are

Options

A. Well developed male gametophyte
B. Partially developed male gametophyte
C. Partially developed male sporophyte
D. Well developed sporophyte

Answer

To answer the question "In angiosperms microspores are:", we will analyze the options provided and understand the role of microspores in the life cycle of angiosperms.

### Step-by-Step Solution:

1. **Understanding Microspores**:
- Microspores are produced in the anthers of flowering plants (angiosperms) during the process of microsporogenesis. They are haploid spores that develop into male gametophytes.

2. **Development of Microspores**:
- Each microspore undergoes mitosis to form a pollen grain, which is the male gametophyte. The pollen grain is not fully developed at this stage; it consists of two cells: the vegetative cell and the generative cell.

3. **Identifying the Type of Gametophyte**:
- The pollen grain is considered an immature male gametophyte because it has not yet completed its development. The generative cell will later divide to form two sperm cells after pollination.

4. **Evaluating the Options**:
- **Well developed male gametophyte**: This is incorrect as the pollen grain is not fully developed.
- **Partially developed male gametophyte**: This is correct because the pollen grain is an immature structure that will develop further.
- **Partially developed male sporophyte**: This is incorrect because microspores are not sporophytes; they are gametophytes.
- **Well developed sporophyte**: This is also incorrect as microspores are not sporophytes.

5. **Conclusion**:
- Based on the analysis, the correct answer is that in angiosperms, microspores are **partially developed male gametophytes**.

### Final Answer:
In angiosperms, microspores are **partially developed male gametophytes**.