Flagellum of Astasia/Euglena is

Options

A. Pantonematic
B. Acronematic
C. Pantachronematic
D. Stichonematic.

Answer

To answer the question regarding the flagellum of Astasia/Euglena, we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Flagellum**:
- A flagellum is a motile structure that aids in the movement of certain unicellular organisms, including Astasia and Euglena.

2. **Classify Flagellum Based on Hair Arrangement**:
- Flagella can be classified based on the arrangement of hair-like structures. There are four types based on this classification:
- **One Row of Hair**: This type has hair arranged in a single row.
- **Two Rows of Hair**: This type has hair arranged in two rows.
- **No Hair**: This type has no hair present.
- **No Hair but with Fine Filaments**: This type has no hair but contains fine filaments of fiber.

3. **Identify Examples for Each Type**:
- For the classification:
- **Stichonymatic**: Example of flagellum with one row of hair.
- **Pantonymatic**: Example of flagellum with two rows of hair.
- **Acronymatic**: Example of flagellum with no hair but fine filaments present.
- **No Hair**: Simple flagellum with no hair.

4. **Determine the Correct Option**:
- The question asks about the flagellum of Astasia/Euglena. According to the classification, the flagellum of these organisms is classified as **Stichonymatic**, which corresponds to having no hair but fine filaments of fiber.

5. **Select the Correct Answer**:
- Based on the analysis, the correct answer is **Stichonymatic** (Option 4).

### Final Answer:
The flagellum of Astasia/Euglena is **Stichonymatic**.

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