Alternation of generation in bryophytes is

Options

A. Haplontic
B. Diplontic
C. Haplodiplontic
D. Different in different members

Answer

To understand the alternation of generations in bryophytes, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Define Alternation of Generations**:
- Alternation of generations is a reproductive cycle that involves two distinct phases: the gametophyte phase (haploid) and the sporophyte phase (diploid).

2. **Identify the Generations in Bryophytes**:
- In bryophytes, the dominant phase is the gametophyte phase, which is haploid (N). This is the stage where the plant spends most of its life cycle.

3. **Understand the Gametophyte Phase**:
- In the gametophyte phase, bryophytes produce gametes (sperm and eggs) through mitosis. This phase is independent and photosynthetic.

4. **Transition to Sporophyte Phase**:
- When gametes fuse during fertilization, they form a diploid zygote (2N), which develops into the sporophyte. The sporophyte is usually dependent on the gametophyte for nutrition.

5. **Sporophyte Phase**:
- The sporophyte undergoes meiosis to produce haploid spores (N), which are then dispersed to grow into new gametophytes, completing the cycle.

6. **Conclusion**:
- Bryophytes exhibit a **haplodiplontic** life cycle, where both the gametophyte and sporophyte generations are present, but the gametophyte is the dominant stage.

### Final Answer:
The correct answer is that bryophytes exhibit a **haplodiplontic** life cycle.