Osmosis is observed during

Options

A. Absorption of water by root hair
B. Symplastic lateral conduction
C. Plasmolysis
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding Osmosis**: Osmosis is defined as the movement of water across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration. This process is crucial for maintaining cell turgor and nutrient absorption in plants.

2. **Identifying the Context**: The question asks in which scenarios osmosis is observed. The options provided are:
- Absorption of water by root hair
- Simplastic lateral conduction
- Plasma lysis
- All of the above

3. **Evaluating Each Option**:
- **Absorption of Water by Root Hair**: Root hairs are specialized structures that absorb water from the soil. The plasma membrane of root hair cells allows water to enter through osmosis, making this option correct.
- **Simplastic Lateral Conduction**: This refers to the movement of water and nutrients between plant cells through their plasma membranes. Since this process also involves osmosis, this option is also correct.
- **Plasma Lysis**: This occurs when a cell loses water and shrinks due to osmosis, leading to the separation of the plasma membrane from the cell wall. This is an example of exosmosis, which confirms that this option is also correct.

4. **Conclusion**: Since all the options involve processes where osmosis is observed, the correct answer is "All of the above."

**Final Answer**: Osmosis is observed during absorption of water by root hair, simplastic lateral conduction, plasma lysis, and thus the correct answer is **All of the above**.

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