Which of the following is not correctly matched

Options

A. Chlamydomonas – Unicellular flagellated
B. Laminaria – Flattened leaf like thallus
C. Chlorella – Unicellular non-flagellated
D. Volvox – Colonial form non-flagellated

Explanation

To determine which of the following options is not correctly matched, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Options**: We need to look at the options given in the question. Each option pairs an algae type with its characteristic feature.

2. **Analyze Option A - Clydemonas**:
- Clydemonas is described as a unicellular flagellated algae.
- This is correct because Clydemonas is indeed a unicellular organism that possesses flagella for movement.

3. **Analyze Option B - Laminaria**:
- Laminaria is described as having a flattened leaf-like thalus.
- This is also correct. Laminaria is a type of brown algae that has a structure resembling a leaf, known as a thalus.

4. **Analyze Option C - Chlorella**:
- Chlorella is described as unicellular non-flagellated.
- This statement is accurate. Chlorella is a unicellular green algae that does not have flagella.

5. **Analyze Option D - Volvox**:
- Volvox is described as a colonial form non-flagellated.
- This statement is incorrect. Volvox is indeed a colonial green algae, but it is motile and has flagella. The cells within the colony are flagellated, allowing the colony to move.

6. **Conclusion**: Since Option D (Volvox) is incorrectly matched as non-flagellated, it is the answer to the question.

### Final Answer:
The option that is not correctly matched is **Option D - Volvox**.

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