The microspores and megaspores germinate into male and female gametophytes respectively in `:`

Options

A. All embryophytes
B. Vascular cryptogams only
C. Some pteridophytes and all spermatophytes
D. Most of the pteridophytes and all phanerogams

Answer

To solve the question regarding which plants have microspores and megaspores that germinate into male and female gametophytes respectively, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Microspores and Megaspores**:
- Microspores are the smaller spores that develop into male gametophytes.
- Megaspores are the larger spores that develop into female gametophytes.

2. **Identifying Heterosporous Plants**:
- Heterosporous plants are those that produce two different types of spores: microspores and megaspores.
- Examples of heterosporous plants include certain pteridophytes (like Salvinia and Selaginella), gymnosperms, and angiosperms.

3. **Analyzing the Options**:
- The question provides several options to choose from. We need to evaluate each option based on our understanding of heterosporous plants.
- **Option 1**: All embryophytes - Incorrect, as bryophytes are not heterosporous.
- **Option 2**: Vascular cryptogams - Incorrect, as not all pteridophytes are heterosporous.
- **Option 3**: Some pteridophytes and all spermatophytes - Correct, as it includes heterosporous pteridophytes and all gymnosperms and angiosperms.
- **Option 4**: Most of the pteridophytes - Incorrect, as only a few are heterosporous.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Option 3: Some pteridophytes and all spermatophytes**.

### Final Answer:
The microspores and megaspores germinate into male and female gametophytes respectively in **some pteridophytes and all spermatophytes**.

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