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Biological Classification — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBiological Classification3 Marks
Question
Highlight the criteria considered for five-kingdom system of classification.
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Answer

Ans. The criteria for five-kingdom classification are as follows:
  1. Complexity of cell structure- All prokaryotic organisms are separated into kingdom Monera.
  2. Body organisation- All unicellular organismsare grouped under Protista, while multicellular organisms are placed under kingdoms Fungi,Plantae and Animalia.
  3. Mode of nutrition- Autotrophs, heterotrophs and holozoic organisms are separated in the kingdoms Plantae, Fungi and Animalia, respectively.
  4. Life style- Producers are placed in kingdom Plantae, while consumers are in Animalia and decomposers in Fungi.
  5. Phylogenetic relationships:
  • The primitive prokaryotic organisms are placed in kingdom Monera.
  • Kingdom Protista includes all unicellular and eukaryotic forms of life and it shows resemblances to the other kingdoms Fungi, Animalia and Plantae.
  • The highly evolved organisms are placed in kingdoms Plantae and Animalia.

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