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 regarding which organisms have chlorophyll a, chlorophyll c, a cellulosic wall, and a gelatinous coating, we can follow these steps:

### Step 1: Identify the Characteristics
The question specifies that we are looking for organisms that possess:
- Chlorophyll a
- Chlorophyll c
- A cellulosic wall
- A gelatinous coating

### Step 2: Understand the Types of Algae
We know that algae can be classified into three main groups based on their pigments:
1. **Red Algae (Rhodophyceae)** - Contains chlorophyll a and phycoerythrin.
2. **Brown Algae (Phaeophyceae)** - Contains chlorophyll a, chlorophyll c, and fucoxanthin.
3. **Green Algae (Chlorophyceae)** - Contains chlorophyll a and b.

### Step 3: Analyze the Options
Now, let's analyze each option provided in the question:

1. **Volvox and Fucus**:
- **Volvox**: A green algae (contains chlorophyll a and b, not c).
- **Fucus**: A brown algae (contains chlorophyll a and c).
- **Conclusion**: This option is incorrect because of Volvox.

2. **Fucus and Porphyra**:
- **Fucus**: A brown algae (contains chlorophyll a and c).
- **Porphyra**: A red algae (contains chlorophyll a and phycoerythrin).
- **Conclusion**: This option is incorrect because of Porphyra.

3. **Cara and Laminaria**:
- **Cara**: A green algae (contains chlorophyll a and b, not c).
- **Laminaria**: A brown algae (contains chlorophyll a and c).
- **Conclusion**: This option is incorrect because of Cara.

4. **Fucus and Laminaria**:
- **Fucus**: A brown algae (contains chlorophyll a and c).
- **Laminaria**: A brown algae (contains chlorophyll a and c).
- **Conclusion**: This option is correct as both are brown algae and meet all the criteria.

### Step 4: Final Answer
The organisms that have chlorophyll a and chlorophyll c in their cells, a cellulosic wall, and are usually covered on the outside by a gelatinous coating are **Fucus and Laminaria**. Thus, the correct answer is **Option 4**.

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