Water passes into a cell due to

Options

A. Op
B. DPD
C. turgor pressure
D. diffusion.

Explanation

To answer the question "Water passes into a cell due to", we need to analyze the options provided and understand the concepts related to water movement in plant cells.

### Step-by-Step Solution:

1. **Understanding Water Movement**: Water movement into and out of cells is primarily influenced by water potential and diffusion pressure deficit (DPD).

2. **Defining Key Terms**:
- **Osmotic Potential (OP)**: This refers to the potential of water to move across a semipermeable membrane due to solute concentration.
- **Diffusion Pressure Deficit (DPD)**: This is the difference between the diffusion pressure of pure water and the diffusion pressure of the solution. It indicates the tendency of water to move into a cell.
- **Turgor Pressure**: This is the pressure exerted by the fluid (water) inside the central vacuole against the cell wall, which helps maintain cell structure.
- **Diffusion**: This is the passive movement of molecules from an area of higher concentration to an area of lower concentration.

3. **Analyzing the Options**:
- **A. OP (Osmotic Potential)**: While osmotic potential plays a role in water movement, it is not the direct cause of water entering the cell.
- **B. DPD (Diffusion Pressure Deficit)**: This is a key factor in water movement. Water moves from areas of lower DPD (where there is less solute and more water) to areas of higher DPD (where there is more solute and less water).
- **C. Turgor Pressure**: This is a result of water entering the cell, not a cause of water entering the cell.
- **D. Diffusion**: While diffusion is a process that can involve water movement, it does not specifically explain the mechanism of water entering a cell in the context of DPD.

4. **Conclusion**: The primary reason water passes into a cell is due to the **Diffusion Pressure Deficit (DPD)**. Water moves from areas of lower DPD to areas of higher DPD, which drives the movement of water into the cell.

### Final Answer:
Water passes into a cell due to **B. DPD (Diffusion Pressure Deficit)**.

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