Which of the following is characterized by presence of multicellular mobile colony ?

Options

A. Chara
B. Laminaria
C. Volvox
D. Dictyota

Answer

To solve the question "Which of the following is characterized by presence of multicellular mobile colony?", we will analyze each option provided and determine which one fits the criteria of being a multicellular and mobile colony.

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Multicellular**: Organisms that are composed of more than one cell.
- **Mobile Colony**: A group of organisms that can move together as a unit.

2. **Evaluate Each Option**:
- **Option A: Cara**
- Cara is a type of green algae. It is typically solitary and attached to a substratum, meaning it does not form a mobile colony.
- **Conclusion**: Not a multicellular mobile colony.

- **Option B: Laminaria**
- Laminaria, also known as kelp, is a brown algae that is also attached to the substratum. It does not form a colony and is solitary.
- **Conclusion**: Not a multicellular mobile colony.

- **Option C: Volvox**
- Volvox is a genus of green algae that forms a spherical colony. It is known for its ability to move as a group, making it both multicellular and mobile.
- **Conclusion**: This is a multicellular mobile colony.

- **Option D: Dictyota**
- Dictyota is a type of seaweed that is also attached to the substratum and does not form a mobile colony.
- **Conclusion**: Not a multicellular mobile colony.

3. **Final Decision**:
- After evaluating all options, the only organism that is characterized by the presence of a multicellular mobile colony is **Volvox**.

### Answer:
The correct option is **Volvox**.

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