Euglenoids have ....... instead of cell wall.

Options

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

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about Euglenoids, which belong to the Kingdom Protista and are unicellular eukaryotes.

2. **Understand the Structure**: In Euglenoids, specifically in the genus Euglena, the typical cell wall found in many other organisms is absent.

3. **Identify the Replacement Structure**: Instead of a cell wall, Euglenoids have a structure that covers their cell. This structure is not a traditional cell wall but serves a similar protective and supportive function.

4. **Name the Structure**: The covering structure in Euglenoids is called a "pellicle." The pellicle is a thin, flexible layer that provides shape and support to the cell.

5. **Clarify the Composition**: The pellicle is a protein-rich layer, which distinguishes it from other types of cell coverings, such as the siliceous frustule found in diatoms or capsules found in some bacteria.

6. **Conclude the Answer**: Therefore, the correct answer to the question "Euglenoids have ....... instead of cell wall" is "pellicle."

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

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