Cell wall is present in :-

Options

A. Euglena
B. Slime mold in vegetative phase
C. Mycoplasma
D. Dinoflagellates

Answer

To determine where the cell wall is present, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Euglena**:
- Euglena is a type of protist that has a flexible outer covering called a pellicle instead of a rigid cell wall. Therefore, the cell wall is **not present** in Euglena.

2. **Slime Mold**:
- Slime molds are also protists, and they do not have a cell wall made of chitin. They can exist in a plasmodial form, which lacks a cell wall. Thus, the cell wall is **not present** in slime molds.

3. **Mycoplasma**:
- Mycoplasma are a group of bacteria that are unique because they completely lack a cell wall. This absence allows them to be resistant to certain antibiotics that target cell wall synthesis. Hence, the cell wall is **not present** in Mycoplasma.

4. **Dinoflagellate**:
- Dinoflagellates are a type of protist that do possess a cell wall, which is often referred to as a theca. This cell wall is made of cellulose and is located around the plasma membrane. Therefore, the cell wall is **present** in dinoflagellates.

### Conclusion:
The correct answer is **Dinoflagellate**, as it is the only option among the given choices that has a cell wall.

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