Five Kingdom System Of Classification

R.H whittaker in 1969 proposed five kingdom classification. In this system the arrangement of five kingdoms is based on following three criterias:

i) The complexity of cell structure i.e Prokaryote and Eukaryote.

ii) The complexity of the organisms body- unicellular and multicellular.

iii) The mode of obtaining nutrition - Autotrops and Heterotrops.

The five kingdoms are Monera, Protista, Plantae, Fungi, Animalia where monerans are microscopic prokaryotes with incipient nucleus which lacks membrane bound cell organelles, protista are aquatic, unicellular eukaryotes which have an organised nucleus, membrane bound cell organelles, Plantae includes multicellular, photosynthetic, eukaryotes with cellulose cell wall, Fungi are multicellular, eukaryotic and heterotropic decomposer, Animalia are multicellulareukaryotes haaving locomotory organs, heterotropic mode of nutrition these includes sponges to mammals.