Sterile jacket cells around reproductive cells is characteristic of :-

Options

A. Algae
B. Bryophyta
C. Fungi
D. Thallophyta

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks about the characteristic feature of sterile jacket cells surrounding reproductive cells. We need to identify which group of organisms exhibits this feature.

2. **Identifying Sterile Jacket Cells:**
Sterile jacket cells are protective layers that surround reproductive structures. They play a crucial role in safeguarding reproductive cells from environmental factors.

3. **Examining Different Groups of Organisms:**
- **Algae:** In algae, the reproductive structures may not typically have a sterile jacket. They often have unicellular sex organs, and in multicellular forms, each cell can produce gametes without a protective jacket.
- **Bryophytes:** In bryophytes (such as mosses and liverworts), reproductive structures called antheridia (male) and archegonia (female) are surrounded by sterile jacket cells. These cells protect the reproductive organs from mechanical damage and desiccation.
- **Pteridophytes:** Similar to bryophytes, pteridophytes also have structures that may be surrounded by sterile cells, but the question specifically points towards a characteristic feature.

4. **Conclusion:**
Based on the analysis, bryophytes are characterized by having sterile jacket cells surrounding their reproductive cells, specifically in structures like antheridia and archegonia.

5. **Final Answer:**
The correct answer is **Bryophyta**.

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