The cork is impervious to water -

Options

A. Due to hemicellulose deposition in the cell wall
B. Due to cellulose deposition in the cell wall.
C. Due to suberin deposition in the cell wall.
D. Due to pectin deposition in the cell wall.

Answer

To answer the question "The cork is impervious to water due to deposition of which of the following components in the cell wall?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Cork**:
- Cork is a secondary protective tissue found on the outer side of stems and roots in plants. It serves as a barrier to protect the plant from external factors.

2. **Formation of Cork**:
- Cork is produced by a type of meristematic tissue known as cork cambium (or phallogen). This tissue is responsible for the production of cork cells (phallum).

3. **Characteristics of Cork Cells**:
- The cork cells that are formed are dead at maturity and lack a vascular supply from the inside. This means they do not have living protoplasts.

4. **Composition of Cork Cells**:
- The cell walls of cork cells are characterized by the deposition of a substance called suberin.

5. **Role of Suberin**:
- Suberin is a waxy material that is deposited in the cell walls of cork cells. This waxy nature is crucial as it makes the cork impervious to water.

6. **Conclusion**:
- Therefore, the reason cork is impervious to water is due to the deposition of suberin in the cell walls of cork cells.

### Final Answer:
The cork is impervious to water due to the deposition of **suberin** in the cell wall.

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