Plant group in which every cell of gametangium forms gametes is

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Gametangium**:
- A gametangium is a specialized structure in plants where gametes (reproductive cells) are produced. It can be an organ or a cell that is responsible for the formation of gametes.

2. **Identifying Plant Groups**:
- We need to analyze the four options provided: Thalophyta, Bryophyta, Pteridophyta, and Gymnosperms.

3. **Analyzing Thalophyta**:
- Thalophyta consists of simple, thallus-like plants. In this group, every cell of the gametangium is capable of producing gametes. This means that all cells can contribute to gamete formation.

4. **Examining Other Options**:
- **Bryophyta**: In bryophytes, gametes are produced in specialized structures called gametangia, but not every cell in the gametangium produces gametes.
- **Pteridophyta**: Similar to bryophytes, pteridophytes have specialized structures for gamete production, but again, not every cell contributes.
- **Gymnosperms**: In gymnosperms, the production of gametes occurs in distinct male and female cones, and not every cell produces gametes.

5. **Conclusion**:
- Since only Thalophyta has the characteristic where every cell of the gametangium forms gametes, the correct answer to the question is **Thalophyta** (Option 1).

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