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

Options

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

Answer

To solve the question "Protonema is juvenile filamentous stage in the life cycle of:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the term "Protonema":**
- Protonema is defined as a juvenile, filamentous stage in the life cycle of certain plants, particularly mosses. It consists of a thread-like chain of cells.

2. **Identify the options given:**
- The options provided are:
1. Funaria
2. Riccia
3. Marchantia
4. Cladophora

3. **Analyze each option:**
- **Funaria:** This is a type of moss, commonly known as cord moss. Funaria does exhibit a protonema stage, which is the juvenile filamentous stage in its life cycle.
- **Riccia:** This is a genus of liverworts. Liverworts do not have a protonema stage in their life cycle.
- **Marchantia:** This is another genus of liverworts. Like Riccia, it also lacks a protonema stage.
- **Cladophora:** This is a green algae and does not have a protonema stage either.

4. **Conclusion:**
- Since only Funaria possesses the protonema stage among the options provided, the correct answer is **Funaria**.

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

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