Most conspicuous alternation of generation occurs is:

Options

A. Thallophyta
B. Bryophyta
C. Pteridophyta
D. Spermatophyta

Answer

**Step-by-Step Solution:**

1. **Understanding Alternation of Generations**:
- Alternation of generations is a reproductive cycle that involves two distinct forms: the sporophyte (diploid) and the gametophyte (haploid).

2. **Identifying the Groups**:
- The question presents four groups: Thalophyta, Bryophyta, Pteridophyta, and Spermatophyta. Each of these groups exhibits alternation of generations, but to varying degrees.

3. **Analyzing Pteridophyta**:
- Pteridophyta, which includes ferns, is known for having a prominent sporophyte generation that is free-living and independent. The sporophyte produces spores through meiosis, which develop into the gametophyte.

4. **Comparing with Other Groups**:
- In Bryophyta (like mosses), the gametophyte is the dominant form and is more conspicuous than the sporophyte. In Thalophyta (like algae), the alternation is less distinct. In Spermatophyta (seed plants), the gametophyte is reduced and dependent on the sporophyte.

5. **Conclusion**:
- Given that Pteridophyta has a prominent and independent sporophyte, it exhibits the most conspicuous alternation of generations compared to the other groups.

6. **Final Answer**:
- Therefore, the answer to the question is **Pteridophyta**.

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