Which of the following organelles is common to plant and animal cells?

Options

A. Centrioles
B. Mitochondria
C. Tonoplast
D. Chloroplasts

Explanation

To determine which organelle is common to both plant and animal cells, we can analyze the options provided:

1. **Centeose**: This organelle is only found in animal cells. It plays a role in cell division but is not present in plant cells.

2. **Mitochondria**: Mitochondria are known as the powerhouse of the cell and are responsible for ATP production. They are found in both plant and animal cells, making them a common organelle.

3. **Tonoplast**: The tonoplast is the membrane surrounding the vacuole in plant cells. It is not found in animal cells, so it is not common to both.

4. **Chloroplast**: Chloroplasts are involved in photosynthesis and are only found in plant cells. They are not present in animal cells.

Based on this analysis, the only organelle that is common to both plant and animal cells is **mitochondria**.

### Final Answer:
The organelle that is common to both plant and animal cells is **mitochondria**.