AP BIOLOGY

Detailed explanation-1: -So if a plant cell is kept in a hypotonic solution, then water will flow from the solution into the plant cell through the cell membrane and cell will swell up due to the uptake of water.

Detailed explanation-2: -Plant cells swell up when kept in hypotonic solution because plant cells absorb large amounts of water in hypotonic solution such that the vacuole is completely filled with water and the cytoplasm presses against the cell wall. But it does not get burst due to the presence of cell wall.

Detailed explanation-3: -When a cell is kept in a hypotonic medium, the cells take up water from external medium and swell up. In plant cells, the cell membrane creates a pressure against the cell wall, which exerts an equal pressure against the swollen cell but do not burst.

Detailed explanation-4: -Contractile vacuoles have been shown to contain osmotically active substances; they shrink in hypertonic and swell in hypotonic solutions regardless of whether remain in the cell or have been removed from the cell.

Detailed explanation-5: - When a plant cell is in a hypertonic solution, water is removed from the vacuole. This causes the plant to shrivel or wilt.