Which of the following cell components is present only in plant cells and absent in all animal cells?

Options

A. Cell membrane
B. Cell wall
C. Vacuole
D. Nucleus

Answer

To answer the question "Which of the following cell components is present only in plant cells and absent in all animal cells?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Options**: The question presents several cell components. We need to evaluate each one to determine if it is unique to plant cells.

2. **Evaluate Option 1: Cell Membrane**:
- The cell membrane is present in both plant and animal cells. It is selectively permeable, allowing certain substances to enter and exit the cell.
- **Conclusion**: This option is incorrect.

3. **Evaluate Option 2: Cell Wall**:
- The cell wall is a rigid outer layer found in plant cells. It provides structural support and protection.
- Animal cells do not have a cell wall; they only have a cell membrane.
- **Conclusion**: This option is correct as the cell wall is unique to plant cells.

4. **Evaluate Option 3: Vacuole**:
- Vacuoles are present in both plant and animal cells, although they are larger and more prominent in plant cells.
- In plant cells, vacuoles help maintain turgor pressure, while in animal cells, they can store waste products and other materials.
- **Conclusion**: This option is incorrect.

5. **Evaluate Option 4: Nucleus**:
- The nucleus is present in both plant and animal cells. It controls cellular activities and houses genetic material.
- **Conclusion**: This option is incorrect.

### Final Answer:
The cell component that is present only in plant cells and absent in all animal cells is the **Cell Wall**.

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