Which class of algae have chlorophyll – a, d, phycoerythrin and lacks flagella?

Options

A. Cyanophyceae
B. Rhodophyceae
C. Phaeophyceae
D. Chlorophyceae

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks for the class of algae that contains chlorophyll A, chlorophyll D, phycoerythrin, and lacks flagella.

2. **Identifying the Classes of Algae:**
Algae are categorized into three main classes:
- **Chlorophyceae (Green Algae)**
- **Phaeophyceae (Brown Algae)**
- **Rhodophyceae (Red Algae)**

3. **Analyzing Each Class:**
- **Chlorophyceae (Green Algae):**
- Contains chlorophyll A and B.
- Flagella are present in many species.
- **Phaeophyceae (Brown Algae):**
- Contains chlorophyll A and C.
- Flagella are present.
- **Rhodophyceae (Red Algae):**
- Contains chlorophyll A and D.
- Contains phycoerythrin, which gives it a red color.
- Lacks flagella.

4. **Conclusion:**
Based on the analysis, the class of algae that contains chlorophyll A, D, phycoerythrin, and lacks flagella is **Rhodophyceae (Red Algae)**.

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