Phycoerythrin, chlorophyll a and chlorophyll d are characteristics of a. Phaeophyceae b. Xanthophyceae c. Chlorophyceae d. Rhodophyceae.

Options

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

Answer

To determine which group of algae contains phycoerythrin, chlorophyll a, and chlorophyll d, we can analyze the characteristics of each option provided:

1. **Identify the pigments in each group:**
- **Option A: Phaeophyceae (Brown Algae)**
- Contains chlorophyll a, chlorophyll c, beta carotene, and xanthophylls.
- **Conclusion:** Does not contain chlorophyll d or phycoerythrin.

- **Option B: Xanthophyceae (Yellow-Green Algae)**
- Contains chlorophyll a, chlorophyll e, beta carotene, and xanthophylls.
- **Conclusion:** Does not contain chlorophyll d or phycoerythrin.

- **Option C: Chlorophyceae (Green Algae)**
- Contains chlorophyll a, chlorophyll b, beta carotene, and zeaxanthin.
- **Conclusion:** Does not contain chlorophyll d or phycoerythrin.

- **Option D: Rhodophyceae (Red Algae)**
- Contains chlorophyll a, chlorophyll d, beta carotene, phycoerythrin, and phycocyanin.
- **Conclusion:** Contains chlorophyll a, chlorophyll d, and phycoerythrin.

2. **Final Decision:**
- Since only Rhodophyceae contains all three pigments (phycoerythrin, chlorophyll a, and chlorophyll d), the correct answer is **Option D: Rhodophyceae**.