Compare the two-kingdom, three-kingdom, and five-kingdom systems of classification.
Feature Two-Kingdom System Three-Kingdom System Five-Kingdom System Proposed By Carolus Linnaeus (1735) Ernst Haeckel (1866) R.H. Whittaker (1969) Number of Kingdoms 2 (Plantae & Animalia) 3 (Plantae, Animalia & Protista) 5 (Monera, Protista, Fungi, Plantae, Animalia) Cell Type No distinction between prokaryotes and eukaryotes Introduced Protista for unicellular organisms Clear distinction between prokaryotes (Monera) and … Read more