Unique features of bryophytes is that they

Options

A. (a) Produce spores
B. (b) Have sporophyte attached to gametophyte
C. (c) Lack roots
D. (d) Lack vascular tissues

Answer

### Step-by-Step Solution

1. **Understanding Bryophytes**:
- Bryophytes are non-vascular plants that include mosses and liverworts. They are considered the first land plants and have unique characteristics that differentiate them from other plant groups.

2. **Life Cycle of Bryophytes**:
- Bryophytes exhibit a life cycle that includes two generations: the haploid gametophyte and the diploid sporophyte. The gametophyte is the dominant stage in their life cycle, while the sporophyte is dependent on the gametophyte.

3. **Identifying Unique Features**:
- The question asks for a unique feature of bryophytes. We need to analyze the options provided:
- **Option A**: "Produce spores" - This is not unique to bryophytes as many plants, including algae, produce spores.
- **Option B**: "Have sporophyte attached to the gametophyte" - This is a unique feature of bryophytes. The sporophyte remains attached to the gametophyte and is dependent on it for nutrition.
- **Option C**: "Lack roots" - This is also not unique since algae also lack true roots.
- **Option D**: "Lack vascular tissues" - This is not unique to bryophytes as algae also lack vascular tissues.

4. **Conclusion**:
- After analyzing the options, the unique feature of bryophytes is that they have a sporophyte that is attached to the gametophyte (Option B). This characteristic is not found in other plant groups such as algae or pteridophytes.

### Final Answer
- The unique feature of bryophytes is that they **have sporophyte attached to the gametophyte**.

---