Select the mismatch

Options

A. Gas vacuoles - Green bacteria
B. Large central vacuoles - Animal cells
C. Protists - Eukaryotes
D. Methanogens - Prokaryotes

Answer

To solve the question of selecting the mismatch from the given options, we will analyze each option step by step.

### Step 1: Analyze Option A - Gas Vacuole and Green Bacteria
- **Explanation**: Gas vacuoles are indeed found in certain bacteria, including green bacteria. They are aggregates of gas vesicles that help the bacteria maintain buoyancy.
- **Conclusion**: This is a correct match.

### Step 2: Analyze Option B - Large Central Vacuole and Animal Cells
- **Explanation**: Large central vacuoles are characteristic of plant cells, not animal cells. In animal cells, there are typically many small vacuoles rather than a single large central vacuole.
- **Conclusion**: This is a mismatch and the correct answer to the question.

### Step 3: Analyze Option C - CCS Protists and Eukaryotes
- **Explanation**: Protists are indeed eukaryotic organisms. They have a well-defined nucleus and membrane-bound organelles, fitting the definition of eukaryotes.
- **Conclusion**: This is a correct match.

### Step 4: Analyze Option D - CCS Methanogens and Prokaryotes
- **Explanation**: Methanogens are a type of bacteria that are prokaryotic. They lack a well-defined nucleus and membrane-bound organelles, which is characteristic of prokaryotes.
- **Conclusion**: This is a correct match.

### Final Conclusion
The mismatch identified is **Option B: Large Central Vacuole and Animal Cells**. This is the only incorrect pairing among the options provided.