The sporophyte is the dominant phase in

Options

A. pteridophytes
B. gymnosperms
C. Angiosperms
D. all of these.

Explanation

### Step-by-Step Solution:

1. **Understanding the Life Cycle of Plants**:
- In plants, there are two main phases in their life cycle: the sporophyte phase and the gametophyte phase. The sporophyte is the diploid phase, while the gametophyte is the haploid phase.

2. **Identifying the Dominant Phase**:
- The question asks which of the given groups (pteridophytes, gymnosperms, angiosperms) has a dominant sporophyte phase. The dominant phase is the one that is more prominent in the life cycle of the plant.

3. **Analyzing Each Group**:
- **Pteridophytes**: In pteridophytes (like ferns), the sporophyte is the dominant phase. They have a well-developed sporophyte that is visible and functional.
- **Gymnosperms**: In gymnosperms (like pine trees), the sporophyte is also the dominant phase. The trees themselves are sporophytes, producing cones for reproduction.
- **Angiosperms**: In angiosperms (flowering plants), the sporophyte is again the dominant phase. The flowering plants that we see are the sporophyte generation.

4. **Conclusion**:
- Since all three groups (pteridophytes, gymnosperms, and angiosperms) have a dominant sporophyte phase, the answer to the question is "all of these".

### Final Answer:
The sporophyte is the dominant phase in **all of these** (pteridophytes, gymnosperms, and angiosperms).

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