Meiosis does not occur in

Options

A. bacteria
B. cyanobacteria
C. plant cell
D. both a and b

Answer

To determine where meiosis does not occur, we need to understand the types of organisms in which meiosis takes place and the types in which it does not.

### Step-by-Step Solution:

1. **Understand Meiosis**:
- Meiosis is a type of cell division that reduces the chromosome number by half and is essential for sexual reproduction. It occurs in eukaryotic organisms.

2. **Identify the Options**:
- The options given are:
- A) Bacteria
- B) Cyanobacteria
- C) Plant cell
- D) Both A and B

3. **Classify the Organisms**:
- **Bacteria**: These are prokaryotic organisms, meaning they do not have a defined nucleus or organelles. They reproduce asexually through binary fission and do not undergo meiosis.
- **Cyanobacteria**: These are also prokaryotic organisms. Like bacteria, they do not undergo meiosis.
- **Plant Cells**: These are eukaryotic organisms and do undergo meiosis during the formation of gametes.

4. **Analyze the Options**:
- Since both A (Bacteria) and B (Cyanobacteria) are prokaryotic, they do not undergo meiosis.
- Option C (Plant cell) does undergo meiosis.
- Therefore, the correct answer is option D (Both A and B), as meiosis does not occur in either bacteria or cyanobacteria.

5. **Conclusion**:
- The correct answer is D) Both A and B.