Epidermal peeling of Tradescantia leaf is used for demonstrating:

Options

A. Plasmolysis and deplasmolysis
B. Active absorption
C. Passive absorption
D. Mineral absorption

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks what the epidermal peeling of a Tradescantia leaf is used to demonstrate. We need to identify the correct biological process that can be observed through this method.

2. **Identifying the Options**: The options provided are:
- Plasmolysis and Deplasmolysis
- Active absorption
- Passive absorption
- Mineral absorption

3. **Defining Plasmolysis and Deplasmolysis**:
- **Plasmolysis**: This is the process where water moves out of the cell, causing the cytoplasm to shrink due to exosmosis. It occurs when a plant cell is placed in a hypertonic solution (where the concentration of solutes outside the cell is higher than inside).
- **Deplasmolysis**: This is the reverse process, where water moves into the cell, causing the cytoplasm to swell. This occurs in a hypotonic solution (where the concentration of solutes outside the cell is lower than inside).

4. **Relevance of Epidermal Peeling**: When we peel the epidermis of a Tradescantia leaf, we expose the cells that can demonstrate these processes. The leaf cells can show the effects of plasmolysis and deplasmolysis when placed in different solutions.

5. **Eliminating Other Options**:
- **Active absorption**: This refers to the process of absorbing nutrients against a concentration gradient, primarily occurring in root cells, not leaves.
- **Passive absorption**: This involves the movement of water and nutrients along a concentration gradient, also primarily occurring in roots.
- **Mineral absorption**: Similar to the above, this process is mainly related to root function.

6. **Conclusion**: Since the epidermal peeling of a Tradescantia leaf allows us to observe plasmolysis and deplasmolysis, the correct answer is that it is used for demonstrating **Plasmolysis and Deplasmolysis**.

**Final Answer**: Epidermal peeling of Tradescantia leaf is used for demonstrating **Plasmolysis and Deplasmolysis**.

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