Which set of characters is specific to red algae ?

Options

A. Phycobilins, chlorophyll a and c
B. Chlorophyll a and d, Floriden starch
C. Flagella absent, Mannitol
D. Fucoxanthin, Floridean starch

Answer

To determine which set of characters is specific to red algae, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Classification of Red Algae**:
- Red algae are classified under the phylum Rhodophyta within the plant kingdom.

2. **Understand the Pigments Present in Red Algae**:
- Red algae contain specific pigments that are essential for their photosynthesis. The primary pigments are chlorophyll a and chlorophyll c. Additionally, they have unique pigments called phycobilins, which are responsible for the red color of these algae.

3. **Examine the Characteristics of Red Algae**:
- Red algae are eukaryotic, meaning they have complex cells with a nucleus. They are primarily found in freshwater environments and have a unique storage polysaccharide known as floridian starch.

4. **Analyze the Given Options**:
- Option 1: Phycobilins, chlorophyll a and c
- Option 2: Chlorophyll a and d, floridian starch
- Option 3: Flagella absent, mannitol
- Option 4: Pucosanthin, floridian starch

5. **Select the Correct Option**:
- Based on the characteristics discussed, the first option (phycobilins, chlorophyll a and c) is specific to red algae. The presence of phycobilins is a distinguishing feature of red algae compared to other types of algae.

### Final Answer:
The set of characters specific to red algae is **phycobilins, chlorophyll a, and c** (Option 1).

---