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23/01/2022 5:34 pm
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Why do all the fresh water organisms have contractile vacuoles whereas, majority of marine organisms lack them?
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23/01/2022 5:36 pm
In majority of fresh water organisms, contractile vacuoles is present which help in osmoregulation (remove excess water from body). In marine organism there is no need of removal of water from body (due to hyptonic condition), hence contractile vacuoles are absent.