Which of the following is not correctly matched

Options

A. Chlamydomonas - Unicellular flagellate
B. Volvox - Flattened leaf like thallus
C. Laminaria - Flattened leaf like thallus
D. Chlorella - Unicellular, non-flagellate.

Answer

To determine which of the following options is not correctly matched, we will analyze each option one by one.

1. **Chlamydomonas - Unicellular Flagellate**:
- Chlamydomonas is indeed a unicellular organism that belongs to the green algae group (Chlorophyta). It has flagella that aid in its motility. This option is correctly matched.

2. **Walvox - Flattened Leaf-like Thallus**:
- Walvox is a type of green algae that forms spherical colonies made up of thousands of cells. It does not have a flattened leaf-like thallus. This option is incorrectly matched.

3. **Laminaria - Flattened Leaf-like Thallus**:
- Laminaria is a type of brown algae (not green algae) that has a flattened body structure resembling a thallus. This option is correctly matched.

4. **Cholera - Unicellular Non-Flagellate**:
- Cholera refers to a genus of green algae that are unicellular and do not have flagella. This option is correctly matched.

After analyzing all the options, we find that the incorrect match is:

**Answer: Option B - Walvox - Flattened Leaf-like Thallus**