Which of the following statements is incorrect?

Options

A. The number of mitochondria in a cell do not correspond to the function of cell .
B. Mitochondria are common to both plant and animal cells .
C. Mitochondria and Chloroplast are semiautonomous organelle
D. Mitochondria divides by fission to increase its number

Answer

To solve the question "Which of the following statements is incorrect?" regarding mitochondria, we will analyze each statement provided and determine which one is false.

### Step-by-Step Solution:

1. **Understanding Mitochondria**:
- Mitochondria are double membrane-bound organelles found in eukaryotic cells, responsible for energy production through ATP generation.

2. **Analyzing the Statements**:
- **Statement 1**: "The number of mitochondria in a cell do not correspond to the function of the cell."
- This statement is incorrect. The number of mitochondria in a cell is directly related to the cell's metabolic activity. Cells that require more energy (like muscle cells) have more mitochondria.

- **Statement 2**: "Mitochondria occur in both plant and animal cells."
- This statement is correct. Mitochondria are present in both types of cells, as they are essential for cellular respiration.

- **Statement 3**: "Mitochondria and chloroplasts are semi-autonomous organelles."
- This statement is correct. Both mitochondria and chloroplasts have their own DNA and can synthesize some of their own proteins, making them semi-autonomous.

- **Statement 4**: "Mitochondria divide by fission to increase their number."
- This statement is also correct. Mitochondria replicate by a process similar to binary fission.

3. **Conclusion**:
- The only incorrect statement is **Statement 1**, which claims that the number of mitochondria does not correspond to the function of the cell. Therefore, this is the answer to the question.

### Final Answer:
The incorrect statement is: "The number of mitochondria in a cell do not correspond to the function of the cell."

---