Select incorrect for haplontic life cycle `:`

Options

A. sporophytic generation is represented only by the one-celled zygote
B. there are no free-living sporophytes
C. haploid spores divide mitotically and form the gametophyte
D. the dominant, photosynthetic phase in such plants is the free-living sporophyte

Answer

To determine the incorrect statement regarding the haplontic life cycle, we will analyze each option based on our understanding of this life cycle.

### Step-by-Step Solution:

1. **Understanding Haplontic Life Cycle**:
- In a haplontic life cycle, the dominant phase is the gametophyte, which is haploid (n).
- The mature gametophyte produces male and female gametes through gametogenesis.

2. **Formation of Zygote**:
- The male and female gametes fuse during fertilization to form a diploid zygote (2n).
- The zygote is the only diploid stage in this life cycle.

3. **Meiosis and Spores**:
- The zygote undergoes zygotic meiosis to produce four haploid spores (n).
- These haploid spores are then released and can develop into new gametophytes.

4. **Analyzing the Options**:
- **Option 1**: "Sporophytic generation is represented only by the one cell zygote."
- This statement is true because the zygote is indeed the only diploid structure in the haplontic cycle.

- **Option 2**: "There are no free living sporophytes."
- This statement is also true as the sporophyte (the zygote) does not exist as a free-living entity in this cycle.

- **Option 3**: "The haploid spores divide mitotically and form the gametophyte."
- This statement is true because haploid spores undergo mitotic division to develop into gametophytes.

- **Option 4**: "The dominant photosynthetic phase in such plants is the free-living sporophyte."
- This statement is incorrect because the dominant phase in the haplontic life cycle is the gametophyte, not the sporophyte.

5. **Conclusion**:
- The incorrect statement regarding the haplontic life cycle is: "The dominant photosynthetic phase in such plants is the free-living sporophyte."