Biology – 3.2 Osmosis | e-Consult

This statement is incorrect because while the cell walls do provide structural support, the water inside the cells, and specifically the pressure it exerts (turgor pressure), is essential for this support to be effective. The cell walls are rigid, but they are not strong enough to hold the plant upright on their own.

Turgor pressure is the pressure exerted by the water inside the plant cells against the cell wall. This pressure pushes the cell contents against the cell wall, making the cells firm and rigid. Without turgor pressure, the cell walls would not be effectively pressed outwards, and the plant cells would become flaccid. This loss of turgor pressure leads to wilting, as the plant loses its internal support. Therefore, the water pressure (turgor pressure) is what enables the cell walls to provide effective support to the plant.