The predominant stage of the life cycle of a moss is the gametophyte which consists of

Options

A. Two stages
B. Three stages
C. Four stages
D. One stages

Answer

### Step-by-Step Solution

1. **Identify the Predominant Stage**: The question states that the predominant stage of the life cycle of a moss is the gametophyte. This is an important aspect of moss biology, as it defines the main form of the plant during its life cycle.

2. **Understand the Structure of the Gametophyte**: The gametophyte stage in moss consists of two main structures: the protonema and the gametophore. The protonema is the first stage that develops from a spore, and it is a filamentous structure that can spread out and absorb water and nutrients.

3. **Differentiate Between Protonema Types**: Within the gametophyte stage, there are two types of protonema:
- **Leafy Protonema**: This is the initial stage that forms after the spore germinates. It is a creeping structure that does not develop much in height.
- **Secondary Protonema**: This stage develops from the leafy protonema and is characterized by an upright growth with lateral buds that can develop into gametophores.

4. **Conclusion on Gametophyte Composition**: Therefore, the predominant stage of the life cycle of a moss consists of the leafy protonema and the secondary protonema, which together contribute to the overall structure of the gametophyte.

### Final Answer
The predominant stage of the life cycle of a moss is the gametophyte, which consists of two stages: the leafy protonema and the secondary protonema.

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