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In Amoeba and Paramecium osmoregulation occurs through:

1. pseudopodia
2. nucleus
3. contractile vacuole
4. general surface

Correct answer: contractile vacuole

Solution

Amoeba and Paramecium live in freshwater, so water constantly enters their cells by osmosis. The contractile vacuole collects this excess water and periodically expels it, preventing the cell from bursting.

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