Dear student
Osmosis in many plant cells.
Osmosis occurs in plants to keep them from wilting. Plant cells have rigid but fully permeable cell walls, and osmosis creates enough pressure against the cell wall to keep the cell turgid. Thus, plant cells can absorb water via osmosis without danger of bursting.
During osmosis, the guard cells swell with water and the pressure triggers the stomata to open. When the stomata open they suck in carbon dioxide from the air which is then used in combination with the water from the roots and the sunlight absorbed in chlorophyll to produce plant energy.
regards