The hydrostatic pressure which develops due to entry of water into a plant cell is

Options

A. Positive
B. Negative
C. Zero
D. Undetermined

Answer

To solve the question regarding the hydrostatic pressure that develops due to the entry of water into a plant cell, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Hydrostatic Pressure**: Hydrostatic pressure is the pressure exerted by a fluid at equilibrium due to the force of gravity. In the context of plant cells, this pressure develops when water enters the cell.

2. **Water Entry into Plant Cells**: When water enters a plant cell, it causes the cell to swell. This is particularly relevant in plant cells because they have a rigid cell wall that can withstand some pressure.

3. **Role of Root Pressure**: In plants, root pressure is a phenomenon that occurs when water is absorbed by the roots from the soil. This absorption creates a positive pressure within the root cells, which can push water upward through the plant.

4. **Conclusion on Hydrostatic Pressure**: Given that the entry of water into the plant cell results in an increase in pressure due to the cell wall's resistance to further expansion, we can conclude that the hydrostatic pressure that develops is indeed positive.

5. **Final Answer**: Therefore, the hydrostatic pressure which develops due to the entry of water into a plant cell is **positive**.