The cell wall is impermeable to water and deposition of suberin occurs in

Options

A. bark
B. cork
C. bast
D. xylem

Answer

To answer the question regarding the impermeability of the cell wall to water and the deposition of suberin, we will analyze each option step by step:

### Step 1: Understand the Question
The question asks about the type of plant tissue where the cell wall is impermeable to water and where suberin is deposited.

### Step 2: Analyze the Options
1. **Bark**:
- Bark refers to all the tissues present outside the vascular cambium.
- It includes various types of cells with different cell wall compositions, not specifically suberized.
- **Conclusion**: Bark is not the correct answer because it does not exclusively consist of cells with impermeable walls.

2. **Cork**:
- Cork is formed from the cells on the outer side of the cork cambium (also known as phallogen).
- These cork cells have suberized cell walls, which means they contain suberin.
- Suberin makes the cell walls impermeable to water.
- **Conclusion**: Cork is the correct answer as it has suberized cell walls that are impermeable to water.

3. **Bast**:
- Bast refers to the secondary phloem, which is involved in the translocation of organic solutes.
- It does not have suberized cell walls and is not impermeable to water.
- **Conclusion**: Bast is not the correct answer.

4. **Xylem**:
- Xylem is a tissue responsible for the conduction of water and minerals in plants.
- It is not impermeable to water; rather, it facilitates water transport.
- **Conclusion**: Xylem is not the correct answer.

### Step 3: Final Answer
After analyzing all the options, the correct answer is **Cork**, as it is the only tissue where the cell wall is impermeable to water due to the deposition of suberin.

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