Robert Whittaker

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Robert Harding Whittaker (December 27, 1920 – October 20, 1980) was a distinguished American plant ecologist

In 1969 Whittaker proposed a "five kingdom" system in which three kingdoms were added to the animals and plants: Monera, Protista, and Fungi. Whittaker defined the kingdoms by a number of special characteristics.[1][2]

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