In mosses gametophyte has 2 stages. What are these stages?

Options

A. 1st stage is sporogonium phase and 2nd protonema stage
B. 1st stage is protonema and the second stage is leafy stage
C. 1st stage is gemmae formation and 2nd one is meiosis
D. 1st stage is zygote and 2nd one is Spore mother cell

Answer

To answer the question about the two stages of the gametophyte in mosses, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Understanding Mosses**:
- Mosses are classified under Bryophytes, which are known as the amphibians of the plant kingdom due to their dependence on water for reproduction.

2. **Gametophyte Dominance**:
- In the life cycle of mosses, the gametophyte stage is the predominant stage. This means that the moss plant we typically observe is primarily in the gametophyte form.

3. **Identifying the Two Stages**:
- The gametophyte in mosses consists of two distinct stages:
- **Protonema Stage**:
- This is the first stage that develops directly from a spore. It is a filamentous structure that serves as the initial growth phase of the moss.
- **Leafy Stage**:
- This is the second stage that develops from the secondary protonema. The leafy stage emerges as lateral buds from the protonema and is the more recognizable form of the moss, characterized by its leaf-like structures.

4. **Conclusion**:
- Therefore, the two stages of the gametophyte in mosses are the **Protonema Stage** and the **Leafy Stage**.