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Which organisms are microscopic and dependent on host organisms for reproduction?

  • A.Algae
  • B.Protozoa
  • C.Viruses
  • D.Bacteria

Answer: C

Correct answer: Viruses

Viruses are microscopic and can reproduce only inside a living host cell: they have no ribosomes and no metabolism of their own, so they must use the host’s. Bacteria, protozoa and algae are cells and multiply on their own.

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