Explain the basis for grouping organisms

R.H Whittaker proposed five kingdom classifications of living organisms which include:

  1. Monera
  2. Protista
  3. Fungi
  4. Plantae
  5. Animalia

Factors that govern the basis of grouping organisms into five kingdoms

Factors that govern the basis of grouping organisms into five kingdoms

  • The number of cells present forms the first criteria.

There are two broad categories of cell structure: eukaryotes and prokaryotes. All prokaryotes come under the kingdom Monera and the rest all are kept in other kingdoms.

  • The arrangement and the number of layers present.

It divides into unicellular and multicellular. Unicellular eukaryotes are kept in the kingdom Protista, while multicellular eukaryotes are kept in other kingdoms.

  • Another important factor for distribution is the existence of the cell wall and also based on the mode of intake of nutrition.

Organisms are divided into autotrophic and heterotrophic based on the mode of nutrition. Heterotrophic organisms in which cell wall is present are taken under the kingdom fungi. Autotrophic organisms in which cell wall is present are taken in the kingdom Plantae. Organisms in which cell wall is absent are taken in the kingdom Animalia.

 

 

 

 

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