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Five Kingdom Classification

The five kingdom classification that we see today was not the initial result of the classification of living organisms. Carolus Linnaeus first came up with a two kingdom classification which included only kingdom Plantae and kingdom Animalia.

The two kingdom classification lasted for a very long time but did not last forever because it did not take into account many major parameters while classifying. There was no differentiation of the eukaryotes and prokaryotes; neither unicellular and multicellular; nor photosynthetic and the non-photosynthetic.

Putting all the organisms in either plant or animal kingdom was insufficient because there were a lot of organisms which could not be classified as either plants or animals.

All these confusions led to a new mode of classification which had to take into account cell structure, the presence of cell wall, mode of reproduction and mode of nutrition. As a result, R H Whittaker came up with the concept of five kingdom classification.

The five kingdom classification of living organisms included the following kingdoms:

Kingdom Monera

The bacteria are categorized underneath the Kingdom Monera.

Features of Monerans

They possess the following important features:

  • Bacteria occur everywhere and they are microscopic in nature.
  • They possess a cell wall and are prokaryotic.
  • The cell wall is formed of amino acids and polysaccharides.
  • Bacteria can be heterotrophic and autotrophic.
  • The heterotrophic bacteria can be parasitic or saprophytic. The autotrophic bacteria can be chemosynthetic or photosynthetic.

Types of Monerans

Bacteria can be classified into four types based on their shape:

  • Coccus (pl.: cocci)- These bacteria are spherical in shape.
  • Bacillus (pl.: bacilli) – These bacteria are rod-shaped,
  • Vibrium (pl.: vibrio) – These bacteria are comma-shaped bacteria
  • Spirillum (pl.: spirilla)- These bacteria are spiral-shaped bacteria

Monera has since been divided into Archaebacteria and Eubacteria.

Lessons

Classification of Living Things into Kingdoms 2

Length: 12 minutesAuthor: RextorialComplexity: Standard

Five Kingdom Classification The five kingdom classification that we see today was not the initial result of the classification of living organisms. Carolus Linnaeus first came up with a two kingdom classification which…

Classification of Living Things into Kingdoms 3

Length: 16 minutesAuthor: RextorialComplexity: Standard

Five Kingdom Classification The five kingdom classification that we see today was not the initial result of the classification of living organisms. Carolus Linnaeus first came up with a two kingdom classification which…

Classification of Living Things into Kingdoms 4

Length: 12 minutesAuthor: RextorialComplexity: Standard

Five Kingdom Classification The five kingdom classification that we see today was not the initial result of the classification of living organisms. Carolus Linnaeus first came up with a two kingdom classification which…

Classification of Living Things into Kingdoms 5a

Length: 19 minutesAuthor: RextorialComplexity: Standard

Five Kingdom Classification The five kingdom classification that we see today was not the initial result of the classification of living organisms. Carolus Linnaeus first came up with a two kingdom classification which…

Classification of Living Things into Kingdoms 5b

Length: 11 minutesAuthor: RextorialComplexity: Standard

Five Kingdom Classification The five kingdom classification that we see today was not the initial result of the classification of living organisms. Carolus Linnaeus first came up with a two kingdom classification which…