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To which biological kingdom does a virus belong?

  1. Animalia

  2. Plantae

  3. Monera

  4. Viridae

The correct answer is: Viridae

Viruses do not fit into any of the traditional biological kingdoms such as Animalia, Plantae, or Monera. This is because they are not considered living organisms since they cannot reproduce or carry out metabolic processes without a host cell. Therefore, while Viridae may sound like a potential kingdom, it is not a scientifically accepted biological classification. Instead, viruses are considered to be a separate type of biological entity known as non-living infectious agents.