Answer:

ROBERT Harding Whittaker was a American plant ecologist, active in the 1950s to the 1970s. He was the FIRST to propose the five kingdom TAXONOMIC classification of the world's biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969.

Explanation:

R.H. Whittaker (1969) proposed a Five Kingdom Classification.

The kingdoms defined by him were named Monera, Protista, Fungi, Plantae and Animalia. The main criteria for classification used by him include cell structure, thallus organisation, mode of nutrition, reproduction and phylogenetic relationships. He developed new approaches for the analysis of plant

communities and provided exemplary INSIGHT into the patterns of composition, productivity, and diversity of land

plants. He brought clarity to such disparate fields as the classification and ordination of plant communities, plant succession, allelochemistry, evolution and measurement of species diversity, niche theory, and the systematics of kingdoms of organisms. In several influential monographs he detailed the vegetational patterns of various montane REGIONS of the United States, and—during the last six years of his life—extended his research to Mediterranean and arid-climate regions of the United States, Israel, Australia, and South Africa.

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