The Five Kingdom Classification System
Scientists, for years, tried to group the living organisms in sense-making groups. Even Aristotle tried; he classified these living forms according to where they lived—on land, in water, or in the air. This was not a very inclusive system that the biologists wanted. This is how the five kingdom classification came about and is still used today.
The Second Cell Division
The scientists early on classified the living things purely based on what one could observe. This meant the two broad categories, only containing plants and animals were introduced. Over time, however, biologists from the likes of Ernst Haeckel, Carl Woese, and Robert Whittaker tried to refine these systems. Of all, however, the most highly accepted was the work by Whittaker in the form of Five Kingdom. Classification, published in 1969.
Whittaker's system classified organisms into five broad kingdoms based upon the cell structure, mode of nutrition, mode of reproduction, and the body organization.
The five kingdoms include:
1.Kingdom Monera
2.Kingdom Protista
3.Kingdom Fungi
4.Kingdom Plantae
5.Kingdom Animalia
