Many cells function properly and divide mitotically even though they do not have

Options

A. Plasma membrane
B. Cytoskeleton
C. Mitochondria
D. Plastids

Answer

To solve the question, "Many cells function properly and divide mitotically even though they do not have," we need to analyze the options provided and determine which organelle is not essential for mitotic cell division.

### Step-by-Step Solution:

1. **Understand the question**: The question is asking which organelle is not necessary for cells to function properly and undergo mitosis.

2. **Evaluate the first option: Plasma Membrane**:
- The plasma membrane surrounds the cell and is crucial for maintaining the integrity of the cell. It regulates what enters and exits the cell, and it is essential for cell division.
- **Conclusion**: The plasma membrane is necessary for cell division. (Incorrect option)

3. **Evaluate the second option: Cytoskeleton**:
- The cytoskeleton provides structural support to the cell and plays a vital role in cell division by helping to segregate chromosomes during mitosis.
- **Conclusion**: The cytoskeleton is necessary for cell division. (Incorrect option)

4. **Evaluate the third option: Mitochondria**:
- Mitochondria are known as the powerhouse of the cell, providing ATP (energy) necessary for various cellular processes, including cell division.
- **Conclusion**: Mitochondria are necessary for cell division. (Incorrect option)

5. **Evaluate the fourth option: Plastid**:
- Plastids are organelles found in plant cells, involved in photosynthesis and storage. They are not present in animal cells and are not essential for cell division.
- **Conclusion**: Plastids are not necessary for cell division in animal cells. (Correct option)

6. **Final Answer**: The correct answer is **Plastid**. Many cells, particularly animal cells, can function properly and divide mitotically even without plastids.