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Who proposed the Three-Kingdom Classification System?

Answer and explanation

Correct answer: Ernst Haeckel

Correct answer: B, Ernst Haeckel. To understand the sequence, Linnaeus is associated with an earlier two-kingdom system containing Plantae and Animalia. Ernst Haeckel proposed a three-kingdom system in 1866 by adding Protista, mainly to accommodate organisms that did not fit comfortably into the plant or animal groups, especially many unicellular organisms. C is wrong because R. H. Whittaker proposed the five-kingdom classification system, not the three-kingdom system. D is wrong because Carl Woese proposed the three-domain system: Bacteria, Archaea, and Eukarya. A is wrong because Linnaeus did not propose the three-kingdom arrangement. Memory cue: Haeckel—three kingdoms; Whittaker—five kingdoms; Woese—three domains.

Related tags

Three-Kingdom ClassificationErnst HaeckelProtistaBiological ClassificationBiodiversityAnd Classification SystemsBiodiversity And Classification SystemsThe Living WorldBiology

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