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Biological Classification — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBiological Classification1 Mark
MCQ
The smallest disease causing agent is:
  • A
    Protozoa
  • B
    Virus
  • C
    Bacteria
  • D
    Fungi
✓

Answer

  1. Virus

Explanation:

A virus is a small infectious agent that replicates only inside the living cells of other organisms.

Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.

Virus is smaller than ants, lice or bacteria. 

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