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, body organisation, mode of nutrition, phylogenetic relationships and reproduction

Kingdom	Cell Type	Cell Wall	Nuclear Membrane	Body Organization	Mode of Nutrition	Main Criteria	Secondary Criteria
Monera	Prokaryotic	Noncellulosic (Polysaccharide + amino acid)	Absent	Cellular	Autotrophic (chemosynthetic and photosynthetic) and Heterotrophic (saprophytic/parasitic)	Cell structure	Body organization, Mode of nutrition
Protista	Eukaryotic	Present in some	Present	Cellular	Autotrophic (Photosynthetic) and Heterotrophic	Cell structure, Nuclear membrane	Mode of nutrition
Fungi	Eukaryotic	Present with chitin	Present	Multicellular/loose tissue	Heterotrophic (Saprophytic/Parasitic)	Cell structure, Mode of nutrition	Body organization
Plantae	Eukaryotic	Present (cellulose)	Present	Tissue/organ	Autotrophic (Photosynthetic)	Cell structure, Mode of nutrition	Body organization
Animalia	Eukaryotic	Absent	Present	Tissue/organ/organ system	Heterotrophic (Holozoic/Saprophytic, etc.)	Cell structure, Mode of nutrition	Body organization, Phylogenetic relationships