Chlamydomonas differs from Spirogyra and Ulothrix in having

Options

A. Glycoprotein instead of cellulose in cell wall
B. Neither chlorophyll a nor chlorophyll b
C. No cell wall
D. Chlorophyll a and chlorophyll d.

Answer

To answer the question "Chlamydomonas differs from Spirogyra and Ulothrix in having," we will analyze the options provided and determine the correct distinction between these algae.

### Step-by-Step Solution:

1. **Identify the Organisms**:
- Chlamydomonas, Spirogyra, and Ulothrix are all types of green algae belonging to the phylum Chlorophyta.

2. **Examine the Cell Wall Composition**:
- **Chlamydomonas**: The cell wall is primarily composed of glycoproteins.
- **Spirogyra**: The cell wall is made up of cellulose and pectin, where pectin forms the outer layer and cellulose forms the inner layer.
- **Ulothrix**: Similar to Spirogyra, Ulothrix also has a cell wall made of cellulose.

3. **Analyze the Options**:
- **Option 1**: Glycoprotein instead of cellulose in the cell wall. (Correct)
- **Option 2**: Neither chlorophyll A nor chlorophyll B. (Incorrect, as all three have chlorophyll A and/or B)
- **Option 3**: No cell wall. (Incorrect, as Chlamydomonas has a cell wall)
- **Option 4**: Chlorophyll A and chlorophyll D. (Incorrect, as Chlamydomonas primarily contains chlorophyll A)

4. **Conclusion**:
- The correct answer is that Chlamydomonas differs from Spirogyra and Ulothrix in having a cell wall made of glycoproteins instead of cellulose.

### Final Answer:
Chlamydomonas differs from Spirogyra and Ulothrix in having glycoprotein instead of cellulose in its cell wall.

---