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Discussion

Organ of defense in protozoans is

  • A.statocysts
  • B.trichocysts
  • C.otocysts
  • D.nematocysts

Answer: B

Correct answer: trichocysts

Trichocysts lie beneath the pellicle of Paramecium and discharge as fine threads when the animal is disturbed, serving in defence and in anchorage. Nematocysts belong to the cnidarians, and statocysts and otocysts are organs of balance in higher animals.

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