Asked by Chuck Bass

Protozoans such as paramecia use contractile vacuoles to expel waste products into their environment.

True
False

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Answered by GPT-5 mini AI
True.

Contractile vacuoles in freshwater protozoa (like Paramecium) collect excess water and some dissolved wastes from the cytoplasm and periodically expel it to the outside, helping osmoregulation and removal of certain wastes.