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Which group of organisms did NOT find a place in Whittaker's classification system?

Answer and explanation

Correct answer: Viruses

Correct answer: B, viruses. Whittaker's five-kingdom system was designed mainly for cellular organisms. Viruses are acellular particles containing genetic material and a protein coat; they do not possess the complete cellular machinery needed for independent metabolism and reproduction. They multiply only after entering a suitable living host cell, so they were not assigned to any of the five kingdoms. A is wrong because bacteria are cellular prokaryotes placed in Monera in the classical system. C is wrong because fungi have their own kingdom. D is wrong because protozoans are unicellular eukaryotes generally included in Protista. This does not mean viruses are unimportant; it means the five-kingdom framework is not designed for acellular entities. Memory cue: five kingdoms classify cells; viruses are acellular.

Related tags

Whittaker ClassificationVirusesAcellular OrganismsFive-Kingdom SystemViroidsAnd PrionsViruses Viroids And PrionsBiological ClassificationBiology

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