Heterospory is found in some members of and all members of

Options

A. Bryophyta, Pteridophyta
B. Pteridophyta, Bryophyta
C. Bryophyta, Gymnospermae
D. Pteridophyta, Spermatophyta

Answer

### Step-by-Step Solution:

1. **Understanding Heterospory**:
- Heterospory refers to the phenomenon where plants produce two different types of spores: microspores and megaspores. Microspores develop into male gametophytes, while megaspores develop into female gametophytes.

2. **Identifying Plant Groups**:
- The question asks about the plant groups where heterospory is found in some members and where it is found in all members.

3. **Analyzing Pteridophyta**:
- Pteridophyta (ferns and their relatives) generally produce homospores (one type of spore). However, there are exceptions. Some members of Pteridophyta, such as Salvinia and Selaginella, are heterosporous. Therefore, heterospory is found in some members of Pteridophyta.

4. **Analyzing Spermatophyta**:
- Spermatophyta includes all seed-producing plants, which consist of Gymnosperms and Angiosperms. All members of this group exhibit heterospory since they produce both microspores and megaspores.

5. **Conclusion**:
- Therefore, the answer to the question is that heterospory is found in some members of Pteridophyta and in all members of Spermatophyta.

### Final Answer:
Heterospory is found in some members of **Pteridophyta** and all members of **Spermatophyta**.

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