Protonema is juvenile filamentous stage in the life cycle of `:`

Options

A. Funaria
B. Riccia
C. Marchantia
D. Cladophora

Answer

To solve the question regarding the juvenile filamentous stage known as Protonema in the life cycle of certain plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Protonema**: Protonema is recognized as a juvenile stage in the life cycle of certain plants, particularly in the group known as bryophytes, which includes mosses.

2. **Identifying the Plant Group**: The question asks specifically about which plant exhibits the protonema stage. We need to consider the options provided.

3. **Analyzing Funeria**: Funeria is a type of moss. In the life cycle of Funeria, the protonema stage is filamentous and autotrophic, meaning it can perform photosynthesis. This stage is crucial for the development of the plant.

4. **Comparing with Other Options**: The transcript mentions Marchantia, which is a liverwort. Unlike Funeria, Marchantia does not have a distinct protonema stage in its life cycle. This helps us confirm that not all plants exhibit this stage.

5. **Conclusion**: Based on the information provided, we conclude that the correct answer to the question is Funeria, as it is the plant that possesses the juvenile filamentous stage known as protonema.

### Final Answer:
Protonema is a juvenile filamentous stage in the life cycle of **Funeria**.

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