Question

Six kingdom classification was suggested by _____.

Answer 1

He was an American biophysicist and microbiologist. He is popular for the identification of the group of single-cell prokaryotic organisms called Archaea.

Complete answer:
There have been many attempts to classify living organisms since the dawn of civilization. Instinctive use has been rendered not by scientific standards but by the desire to use species for our own usage-for food, clothing and shelter. Aristoteles was the first to try to establish a more scientific framework for classification. He used basic morphological properties in order to categorise plants into trees, shrubs and herbs. He also classified animals into two classes, red blood and non-red blood. At Linnaeus, a Two Kingdom system was created, consisting of all plants and animals, with the plants and animals. This method did not distinctively differentiate between eukaryotes and prokaryotes, single and multicellular species and photosynthesis and non photosynthesis. The plant and animal categorisation of species was quickly achieved and easily understood but there was no category for many species.
The basic division of the prokaryotes into the Eubacteria and Archaebacteria was proposed in 1977 by Carl Woese and colleagues on the basis of the structure of RNA, which would subsequently lead to 3 "domains" of life: bacteria, archaea and eukaryote. Combined with the model for five kingdoms, it provided a model of six kingdoms, where the Monera kingdom is replaced by the bacteria and the archaea kingdom.

Note: The six-kingdom classification includes Bacteria, Archaea, Protista, Fungi, Plantae, and Animalia. In recent high school biology books in the US, this six-kingdom model was widely used, but it gets criticism for compromising the established scientific consensus.