Cell wall has stiff cellulose plates on the surface of cells in

Options

A. Gonyaulax
B. Euglena
C. Diatoms
D. Slime moulds

Answer

To determine which species has a cell wall made of stiff cellulose plates, we will analyze each of the four given species: Goniolax, Euglena, diatoms, and slime molds.

### Step-by-Step Solution:

1. **Identify the Species**: We have four species to analyze: Goniolax, Euglena, diatoms, and slime molds.

2. **Analyze Goniolax**:
- Goniolax is known to have a cell wall made of cellulose plates.
- Therefore, in Goniolax, the cell wall is indeed composed of stiff cellulose plates.

3. **Analyze Euglena**:
- Euglena does not possess a traditional cell wall. Instead, it has a flexible pellicle.
- Since there is no cell wall in Euglena, this option is incorrect.

4. **Analyze Diatoms**:
- Diatoms have a cell wall made of silica (silica plates), not cellulose.
- Therefore, diatoms do not have cellulose plates, making this option incorrect.

5. **Analyze Slime Molds**:
- In slime molds, during their vegetative phase, they do not have a cell wall.
- Even when they do have a cell wall, it is not made of cellulose plates, so this option is also incorrect.

6. **Conclusion**:
- After analyzing all four species, the only one that has a cell wall made of stiff cellulose plates is Goniolax.

### Final Answer:
The species that has a cell wall with stiff cellulose plates is **Goniolax**.

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