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The positive hydrostatic pressure is cal...

The positive hydrostatic pressure is called

A

Turgor pressure

B

Wall pressure

C

Gravity potential

D

Osmotic pressure

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**Step-by-Step Solution:** 1. **Understanding Hydrostatic Pressure**: Hydrostatic pressure refers to the pressure exerted by a fluid at equilibrium due to the force of gravity. In the context of plants, this pressure is often related to the water within plant cells. 2. **Identifying Positive Hydrostatic Pressure**: The term "positive hydrostatic pressure" is used to describe the pressure that pushes against the cell wall. In plant cells, this pressure is crucial for maintaining structure and rigidity. 3. **Defining Turgor Pressure**: The specific term for positive hydrostatic pressure in plant cells is "turgor pressure." Turgor pressure is the pressure exerted by the fluid (usually water) inside the cell against the cell wall. 4. **Mechanism of Turgor Pressure**: Turgor pressure is generated when water enters the cell through osmosis. The water moves through the selectively permeable plasma membrane, causing the cell to swell and exert pressure against the cell wall. 5. **Conclusion**: Therefore, the positive hydrostatic pressure in plant cells is known as turgor pressure. **Final Answer**: The positive hydrostatic pressure is called **turgor pressure**. ---
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