In ferns, fertilization does not involve

Options

A. Pollen tube
B. Archegonia
C. Flagellate antherozoids
D. Water.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the components involved in the fertilization process in ferns and specifically which one is not involved.

2. **Identifying the Key Components**: In ferns, the key components involved in fertilization include:
- **Archegonia**: The female reproductive structure that contains the egg.
- **Antheridia**: The male reproductive structure that produces sperm (flagellated).
- **Flagellated Sperm (Anthrozoids)**: The male gametes that swim to the egg.
- **Water**: Necessary for the sperm to swim to the archegonia for fertilization.

3. **Analyzing the Options**: The options provided are:
- Polentube
- Archegonia
- Flagellate
- Anthrozoids
- Water

4. **Eliminating Involved Components**:
- **Archegonia**: Involved in fertilization as it contains the egg.
- **Flagellated Sperm (Anthrozoids)**: Involved as they are the male gametes.
- **Water**: Essential for the movement of sperm to the egg.

5. **Identifying the Non-Involved Component**:
- **Polentube**: This is not involved in the fertilization of ferns. In flowering plants, pollen tubes are responsible for delivering sperm to the egg, but ferns do not have this structure.

6. **Conclusion**: Based on the analysis, the correct answer is **Polentube** as it is not involved in the fertilization process in ferns.

### Final Answer:
In ferns, fertilization does not involve **Polentube**.

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