Kingdom classification is the highest classification into which the organisms are grouped in the taxonomy. It is ranked above the phylum.
Carolus Linnaeus first came up with a two-kingdom classification, which included only kingdom Plantae and kingdom Animalia.
Later, R H Whittaker came up with the concept of the five-kingdom classification. The five-kingdom classification of living organisms included kingdoms - Monera, Protista, Fungi, Plantae and Animalia.
The three domains of life are Bacteria, Archaea and Eukarya.
Five-kingdom classification
R.H. Whittaker proposed the five-kingdom classification in 1969.
This classification was based upon certain characters like mode of nutrition, thallus organization, cell structure, phylogenetic relationships and reproduction.
This form of kingdom classification includes five kingdoms Monera, Protista, Fungi, Plantae and Animalia.
Thus, the above points sum up the kingdoms of life.