In which of the following is a contractile va | vedclass

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(A) contractile vacuole is an organelle involved in osmoregulation and excretion in many freshwater protists.Among the given options,ciliated protozoa

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Ciliated protozoans

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(A) contractile vacuole is an organelle involved in osmoregulation and excretion in many freshwater protists.Among the given options,ciliated protozoans (such as $Paramecium$) possess contractile vacuoles to pump out excess water that enters the cell via osmosis.Bacteria and algae do not possess contractile vacuoles as they have cell walls that provide structural support against osmotic pressure.

In which of the following is a contractile vacuole present?

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