Which of the following is non-flagellate in nature ?

Options

A. Chlorella
B. Ulothrix
C. Spirogyra
D. All of the above

Answer

To solve the question "Which of the following is non-flagellate in nature?", we need to understand what a flagellate organism is and identify the characteristics of the organisms listed in the options.

### Step-by-Step Solution:

1. **Understand Flagella**:
- Flagella are long, hair-like structures that many organisms use for movement. They are typically found in motile cells and help in locomotion.

2. **Identify the Organisms**:
- The question likely provides a list of organisms, all of which belong to the group of green algae known as Chlorophyta. We need to analyze whether these organisms possess flagella or not.

3. **Analyze the Characteristics of Green Algae**:
- Green algae can be flagellate or non-flagellate. However, in this case, the question specifies that we are looking for non-flagellate organisms.

4. **Determine the Presence of Flagella**:
- For each organism listed, we need to confirm if they have flagella. The transcript indicates that the organisms in question are filamentous and do not possess flagella.

5. **Conclusion**:
- Since all the organisms listed are non-flagellate, the answer to the question is "All of the above".

### Final Answer:
All of the above organisms are non-flagellate in nature.

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