Diplontic life cycle is found in:-

Options

A. Thallophyta & Bryophyta
B. Gymnosperms and Angiosperms
C. Bryophyta and Pteridophyta
D. Both 2 and 3

Answer

To determine where the diplontic life cycle is found, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Life Cycle Types**:
- There are two main types of life cycles in plants: haplontic and diplontic.
- In a haplontic life cycle, the dominant phase is the gametophyte, which is haploid (n).
- In a diplontic life cycle, the dominant phase is the sporophyte, which is diploid (2n).

2. **Identify Plant Groups**:
- The question provides four options:
1. Thallophyta and Bryophyta
2. Gymnosperms and Angiosperms
3. Bryophyta and Teratophyta
4. Both 2 and 3

3. **Analyze Each Group**:
- **Thallophyta and Bryophyta**: These groups primarily exhibit a haplontic life cycle, where the gametophyte is the dominant form.
- **Gymnosperms and Angiosperms**: Both of these groups exhibit a diplontic life cycle, where the sporophyte is the dominant form.
- **Bryophyta and Teratophyta**: Bryophyta (mosses, liverworts) are haplontic, while Teratophyta (ferns) have a more complex life cycle but are not classified as diplontic.
- **Both 2 and 3**: Since option 3 includes Bryophyta, which is haplontic, this option cannot be correct.

4. **Conclusion**:
- The correct answer is option 2: Gymnosperms and Angiosperms are the groups where the diplontic life cycle is found.

### Final Answer:
The diplontic life cycle is found in **Gymnosperms and Angiosperms** (Option 2).

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