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Largest fresh water protozoa is:

  • A.Paramecium caudatum
  • B.Pelomyxa palustris
  • C.Vorticella minim
  • D.Spirostomum ambiguum

Answer: B

Correct answer: Pelomyxa palustris

Pelomyxa palustris is a giant amoeba of freshwater mud, reaching several millimetres and visible without a lens. It is remarkable in other ways too - multinucleate, with hundreds of nuclei, and containing symbiotic bacteria in place of mitochondria.

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