Which of the following is true for life cycle of bryophytes ?

Options

A. Dominant, diploid , multicellular sporophyte alters dominant with multicellular gametophytes.
B. Dominant , haploid multicellular gametophyte Which alternates with diploid sporophyte .
C. The plant body shows diplomatic life cycle.
D. The plant body shows haplontic life cycle .

Answer

To solve the question regarding the life cycle of bryophytes, we need to analyze the options provided and understand the characteristics of bryophytes.

### Step-by-Step Solution:

1. **Understanding Bryophytes**:
- Bryophytes are non-vascular plants that include mosses and liverworts. They are often referred to as the "amphibians of the plant kingdom" because they require water for reproduction.

2. **Life Cycle Characteristics**:
- The life cycle of bryophytes is characterized by an alternation of generations, which includes both a haploid gametophyte phase and a diploid sporophyte phase.
- In bryophytes, the dominant phase is the haploid gametophyte, which is multicellular and produces gametes (sperm and eggs).

3. **Analyzing the Options**:
- **Option 1**: "Dominant diploid multicellular sporophyte alters dominant with multicellular gametophyte."
- This is incorrect because the sporophyte is not the dominant phase in bryophytes.
- **Option 2**: "Dominant haploid multicellular gametophyte which alters with diploid sporophyte."
- This is correct. The gametophyte is the dominant phase, and it alternates with the sporophyte.
- **Option 3**: "The plant body shows diplomatic life cycle."
- This is incorrect as bryophytes do not exhibit a purely diploid life cycle.
- **Option 4**: "The plant body shows haplontic life cycle."
- This is also incorrect because bryophytes exhibit a haplo-diplontic life cycle, not purely haplontic.

4. **Conclusion**:
- The correct statement regarding the life cycle of bryophytes is **Option 2**: "Dominant haploid multicellular gametophyte which alters with diploid sporophyte."