Which of these organisms have chlorophyll a and chlorophyll c in their cells and a cellulosic wall usually covered on the outside by a gelatinous coating ?

Options

A. Volvox and Fucus
B. Fucus and Porphyra
C. Chara and Laminaria
D. Fucus and Laminaria

Answer

To solve the question, we need to identify which organisms possess both chlorophyll a and chlorophyll c, have a cellulosic wall, and are usually covered by a gelatinous coating. Here’s the step-by-step solution:

### Step 1: Understand the Types of Algae
Algae are classified into three main groups based on their pigments:
- **Chlorophyceae (Green Algae)**: Contains chlorophyll a and b.
- **Rhodophyceae (Red Algae)**: Contains chlorophyll a and d.
- **Phaeophyceae (Brown Algae)**: Contains chlorophyll a and c.

### Step 2: Analyze the Options
We have four options to consider:
1. **Volvox and Fucus**: Volvox is a green algae (Chlorophyceae) and contains chlorophyll a and b, but not c. Fucus is a brown algae (Phaeophyceae) and contains chlorophyll a and c.
2. **Fucus and Porphyra**: Fucus is brown algae (contains chlorophyll a and c), but Porphyra is red algae (Rhodophyceae) and contains chlorophyll a and d, but not c.
3. **Cara and Laminaria**: Cara is a green algae (contains chlorophyll a and b), while Laminaria is brown algae (contains chlorophyll a and c).
4. **Fucus and Laminaria**: Both are brown algae (Phaeophyceae) and contain chlorophyll a and c.

### Step 3: Identify the Correct Answer
From the analysis:
- **Option 1**: Incorrect because Volvox does not have chlorophyll c.
- **Option 2**: Incorrect because Porphyra does not have chlorophyll c.
- **Option 3**: Incorrect because Cara does not have chlorophyll c.
- **Option 4**: Correct because both Fucus and Laminaria are brown algae and contain chlorophyll a and c.

### Conclusion
The correct answer is **Fucus and Laminaria**.