Spirogyra is _________.

Options

A. an algae
B. a fungi
C. a protozoa
D. a bacteria

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about "Spirogyra". To answer this, we need to determine what type of organism Spirogyra is.

2. **Review the Options**: The options provided are:
- A) Algae
- B) Fungi
- C) Protozoa
- D) Bacteria

3. **Determine the Classification**: Spirogyra is known to be a type of organism that thrives in freshwater environments. It is specifically classified as a filamentous algae.

4. **Characteristics of Spirogyra**:
- It is filamentous, meaning it forms long, unbranched chains of cylindrical cells.
- It has a unique feature of spiral chloroplasts, which gives it its name "Spirogyra" (where "spiro" means spiral).

5. **Conclusion**: Based on the information, Spirogyra is classified as an algae, making the correct answer option A.

**Final Answer**: Spirogyra is **algae**.

---