Five groups divided into two based on cell type

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  • July 15, 2023
9th Biology Ch#03 Biodiversity Five groups divided into two based on cell type

Five Groups Divided Into Two Groups on the Basis of Type of Cell

Five kingdoms can divide into two groups on the basis of cells in following ways.

  1.   Kingdom Monera (organisms with Prokaryotic cells)
  2.   Kingdom Protista, Fungi, Plantae, Animalia, (organism with eukaryotic cells)

Prions and Viroids

Prions and viroids are acellular forms of organisms. Both of these particles cause infectious diseases in certain plants. They are not included in the five kingdom classification.

Prions:

They are composed of proteins only.

Viroids:

They are composed of circular RNA only.

Virus

Viruses are at the borderline of living and non-living. They have both living and non-living features which distinguish their unique Identity.

Non-living Features:

  •  Due to their crystalline nature, they are considered as non-living.
  •  They are acellular i.e., that do not have a cellular organization.

Living Features:

  •  They contain DNA or RNA normally enclosed in a protein coat.
  •  They reproduce, but only in living cells.
  •  They cause a number of diseases in living cells.

Conclusion:

  • They are not considered as organisms and thus are not assigned any place in the five-kingdom classification system.

Quiz

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