IGNOU LSE 9 2026 - Describe the five-kingdom classification as proposed by Whittaker and

Question

Describe the five-kingdom classification as proposed by Whittaker and discuss its limitations.

28 Jan 2026

Answer :

Word Count : 465

Whittaker’s five-kingdom classification, proposed in 1969, was a major advancement in understanding the diversity of life. He divided all living organisms into five kingdoms: Monera, Protista, Fungi, Plantae, and Animalia. This system was based on several criteria including cell structure, mode of nutrition, level of organization, and phylogenetic relationships. The kingdom Monera included all prokaryotic organisms, such as bacteria and cyanobacteria, characterized by the absence of a true nucleus and membrane-bound organelles. Protista comprised unicellular eukaryotes and simple multicellular organisms like protozoa and algae, which show more complex cellular organization than Monera but do not form true tissues. Fungi included multicellular eukaryotic organisms like mushrooms and molds,

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