Bhawna Bhardwaj,Subject matter expert at Edumarz
Solution-With time, the classification systems have undergone many alterations.
- Aristotle made the first attempt at classification. He divided plants into three categories: herbs, shrubs, and trees. Animals, on the other hand, were classed according to whether or not they had red blood cells. This classification system was unable to classify all known creatures.
- As a result, Linnaeus devised a two-kingdom classification system. It is divided into two kingdoms: Plantae and Animalia. However,this method failed to differentiate between unicellular and multicellular,as well as eukaryotes and prokaryotes.
As a result,a large number of creatures could not be classified as belonging to either realm.
- R.H Whittaker suggested a five-kingdom classification scheme in 1969 to address these issues. Five kingdoms, Monera, Protista, Fungi, Plantae, and Animalia, were constituted based on features such as cell structure, mode of nourishment, and existence of a cell wall.
Background-
Kingdom Monera includes the bacteria. Bacteria are the only members in the kingdom of Monera.
Kingdom Protista includes all single-celled eukaryotes.
Kingdom Fungi are heterotrophic organisms.
Kingdom Plantae includes all the chlorophyll-containing organisms called plants.
Kingdom Animalia includes heterotrophic organisms which are multicellular and lack cell walls.