1. Two-Kingdom Taxonomy: Greek philosopher Aristotle, the father of biology, divided the living world into two kingdoms. Plant Kingdom and Animal Kingdom. From Theophrastus to Carolus Linnaeus these two kingdoms were divided. In 1972, Altman and Dittmar included bacteria in the plant kingdom.
2. Three-Kingdom Taxonomy: Scientists Kurtis (1968), Stanier (1970) and Dadson (1971) proposed a third kingdom of the biosphere, Protista. Protista is named after the Greek word protistos meaning first. Bacteria, protista and sponges were included in the kingdom Protista. The proposed three kingdoms are Protista, Plantae and Animalia.
3. Four kingdom taxonomy: In 1956 scientist Copeland separated bacteria from protista and proposed kingdom Monera. The proposed four kingdoms are Monera, Protista, Plantae and Animalia.
4. Five Kingdom Taxonomy: In 1969 scientist Whittaker separated fungi from plants and established kingdom Fungi. Margulis recognized the kingdom Fungi in 1974. The proposed five kingdoms are Monera, Protista, Fungi, Plantae and Animalia
5. Sixth State Classification: In the late 1970s Monara State was divided into two separate states. Archaebacteria and Eubacteria. In the sixth kingdom taxonomy, the biosphere is divided into three domains. Archaea, Bacteria and Eukarya. Domain Archaea kingdom Archaebacteria, Bacteria kingdom Eubacteria and Eukarya kingdom Protista, Fungi, Plantae and Animalia.