Answer: A contractile vacuole (CV) is an organelle, or sub-cellular structure, that is involved in osmoregulation and waste removal. ... In freshwater environments, the concentration of solutes inside the cell is higher than outside the cell. Under these conditions, water flows from the environment into the cell by osmosis. The contractile vacuole (CV) complex is an osmoregulatory organelle of free-living amoebae and protozoa, which controls the intracellular water balance by accumulating and expelling excess water out of the cell, allowing cells to survive under hypotonic stress as in pond water.
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I guess the answer to the question is ecology.
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Root cutting is when you take a portion of a plant and cut it from the parent plant which is usually called the mother plant and planted to grow on its own.
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When it rains, some water soaks into the ground and some of it collects, forming streams and rivers that eventually flow into the sea. ... Three quarters of planet earth's surface is covered by salt water – the seas and oceans.
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