Kingdom classification is the highest classification into which the organisms are grouped in the taxonomy. It is ranked above the phylum. In biology, a kingdom is a taxonomic rank that is composed of smaller groups called phyla (or divisions, in plants). Supplement. Historically, the kingdom is the highest taxonomic rank or the most general taxon used in classifying organisms.
Linnaeus later classified all living organisms into two kingdoms – Plantae and Animalia. Whittaker proposed an elaborate five-kingdom classification – Monera, Protista, Fungi, Plantae, and Animalia.
Some limitations of Kingdom Classification-
- Unicellular algae are kept in kingdom Protista, whereas algae-like multicellular organisms are kept in kingdom Plantae. But similar organisms must be put together.
- There is diversity in kingdom Protista. Dissimilar organisms must not be kept in the same group.
- There is no place for viruses.
- Similar organisms are kept far from each other. For example- Unicellular and multicellular algae.
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