Turgor movements are due to

Options

A. Reversible changes in cell volume due to changes in turgidity of cell.
B. Reversible changes in cell volume due to simple cell contraction in cell.
C. Irreversible changes in cell volume due to maintenance of turgidity of cell
D. Irreversible changes in cell volume due to cell elongation.

Answer

### Step-by-Step Solution:

1. **Understanding Turgor Movements**: Turgor movements refer to the movements in plants that are caused by the pressure of the fluid (water) inside the plant cells. This pressure is known as turgor pressure.

2. **Role of Water Pressure**: The internal water pressure within the cells changes during turgor movements. This change in pressure affects the volume of the cells.

3. **Reversible Changes**: The changes in cell volume due to turgor pressure are reversible. This means that when the conditions that caused the change are reversed (like the availability of water), the cells can return to their original state.

4. **Cause of Turgidity**: Turgidity, or the state of being swollen with water, is primarily due to the amount of water present in the vacuoles of plant cells. When cells take in water, they swell and become turgid, leading to turgor movements.

5. **Conclusion**: Therefore, turgor movements are due to reversible changes in cell volume that occur as a result of changes in the turgidity of the cells.

6. **Final Answer**: Turgor movements are due to reversible changes in cell volume due to changes in turgidity of cells.