Euglenoids have __________ instead of cell wall

Options

A. Siliceous frustule
B. Pellicle
C. Capsule
D. Cell membrane

Answer

To answer the question "Euglenoids have __________ instead of cell wall," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Euglenoids**:
- Euglenoids are a group of single-celled organisms that belong to the kingdom Protista. They are known for their unique characteristics, including their ability to photosynthesize and their motility.

2. **Cell Wall Characteristics**:
- Unlike many other organisms, euglenoids do not possess a traditional cell wall. Instead, they have a different structure that serves a similar purpose.

3. **Identifying the Correct Structure**:
- The options provided are:
- Siliceous frustules
- Pellicle
- Capsule
- Cell membrane

4. **Analyzing Each Option**:
- **Siliceous Frustules**: This structure is found in diatoms, not euglenoids. Therefore, this option is incorrect.
- **Capsule**: Capsules are typically found in certain bacteria and are not a feature of euglenoids. Hence, this option is also incorrect.
- **Cell Membrane**: While euglenoids do have a cell membrane, this is not the structure that replaces the cell wall. The cell membrane is present in all cells and does not specifically define euglenoids.
- **Pellicle**: This is a protein layer that provides structural support and maintains the shape of the euglenoid. It is unique to euglenoids and serves the function of a cell wall.

5. **Conclusion**:
- Based on the analysis, the correct answer to the question is "pellicle." Euglenoids have a pellicle instead of a cell wall.

### Final Answer:
Euglenoids have **pellicle** instead of cell wall.