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Microorganisms: Friend and Foe — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceMicroorganisms: Friend and Foe1 Mark
MCQ
Which organisms are microscopic and dependent on host organisms for reproduction?
  • ✓
    Viruses
  • B
    Bacteria
  • C
    Algae
  • D
    Protozoa
✓

Answer

Correct option: A.
Viruses
Viruses are non$-$cellular microorganisms composed of protein, nucleic acids and lipids. Viruses are considered both living and non living organisms. They are active inside host cells and reproduce inside them by infecting living cells. Outside a host it is considered non-living as it does not have a cellular machinery of its own.

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