1. Why do plants need a cell wall ?
Answers
Explanation:
When the solute concentration on one side of the cell membrane is higher than the concentration on the other side and the solutes cannot cross, the water diffuses across in a process called osmosis. Since solute concentration inside plant cells is typically higher than the solute concentration in the immediate surroundings, water diffuses into the cells, and if there was no cell wall, the cells would burst. The cell wall prevents the plant cells from bursting and helps to give the plant the structural support it needs; the "turgor pressure" caused by osmosis helps to give the plant rigidity and keep it upright.
Answer:
The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. ... In drought, a plant may wilt, but its cell walls help maintain the structural integrity of its stems, leaves, and other structures, despite a shrinking, less turgid vacuoles.