Euglena is biflagellated and has cell wall.
Because cell wall is present, thus Euglena is a plant.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

To solve the question regarding Euglena, we need to analyze the assertion and the reason provided in the statement.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Euglena is biflagellated and has a cell wall."
- We need to verify if this statement is true or false.

2. **Analyzing Euglena**:
- Euglena is indeed a biflagellated organism, meaning it has two flagella.
- However, it does not have a traditional cell wall. Instead, Euglena has a flexible outer layer called a pellicle, which is made of protein and supported by microtubules.

3. **Conclusion about the Assertion**:
- Since Euglena does not possess a cell wall, the assertion is **incorrect**.

4. **Understanding the Reason**:
- The reason states, "Because cell wall is present, thus Euglena is a plant."
- Since we have established that Euglena does not have a cell wall, this reason is also **incorrect**.

5. **Final Evaluation**:
- Both the assertion and the reason are incorrect.
- Therefore, the correct answer to the question is that both the assertion and the reason are wrong.

### Final Answer:
Both the assertion and the reason are incorrect.

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