EVERYDAY SCIENCE

Detailed explanation-1: -Organisms that live in a hypotonic environment such as freshwater, need a way to prevent their cells from taking in too much water by osmosis. A contractile vacuole is a type of vacuole that removes excess water from a cell. Freshwater protists, such as the paramecium shown in Figure below, have a contractile vacuole.

Detailed explanation-2: -A hypertonic solution has a higher solute concentration compared to the intracellular solute concentration.

Detailed explanation-3: -In biology, the tonicity of a solution usually refers to its solute concentration relative to that of another solution on the opposite side of a cell membrane; a solution outside of a cell is called hypertonic if it has a greater concentration of solutes than the cytosol inside the cell.

Detailed explanation-4: -In hypertonic environment, Paramecium cell will lose water due to osmosis and eventually die.