Chloroplast of Chlamydomonas is

Options

A. Collar-shaped
B. Spiral
C. Cup-shaped
D. Stellate

Answer

To determine the shape of the chloroplast in Chlamydomonas, we can analyze the options provided and compare them with known characteristics of chloroplasts in various organisms.

### Step-by-Step Solution:

1. **Identify the Organism**: We are focusing on Chlamydomonas, a unicellular green alga.

2. **Examine the Options**: The options given are:
- Collar shaped
- Spiral
- Cup shaped
- Stellate

3. **Recall Known Characteristics**:
- **Cup-shaped**: This is a well-documented characteristic of Chlamydomonas. The chloroplast is typically described as cup-shaped, occupying a significant portion of the cell.
- **Collar shaped**: This shape is characteristic of Ulothrix, not Chlamydomonas.
- **Spiral**: Spiral-shaped chloroplasts are found in Spirogyra, which is another type of green algae.
- **Stellate**: Stellate chloroplasts are associated with Zygnema, not Chlamydomonas.

4. **Conclusion**: Based on the characteristics of the chloroplasts and the options provided, the correct answer is that the chloroplast of Chlamydomonas is **cup shaped**.

### Final Answer:
The chloroplast of Chlamydomonas is **cup shaped**.

---