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Thittaker (1969) proposed a Five Kingdom Clasalflcation. The defined by him were named Monera, Protista, Fungi, Plantae afia. The main criteria for classification used by him include cell body organisation, mode of nutrition, reproduction and ic relationships. Table $2.1$ gives a comparative account of different tres orthe five kingdoms. $⟶$ care Weose e-domain system has also been proposed that divides the Kingdom two domains, leaving the remaining eukaryotic kingdoms in the n and thereby a six kingdom classification. You will learn about in detail at higher classes. ok at this five kingdom classification to understand the issues rations that influenced the classification system. Earlier systems included bacterla, blue green algae, fungl, mosses, sperms and the anglosperms under 'Plants'. The character his whole kingdom was that all the organisms included had a eir cells. This placed together groups which widely differed in eristics. It brought together the prokaryotic bacteria and the ae (cyanobacteria) with other groups which were eukaryotic. $d$ together the unicellular organisms and the multicellular xample, Chlamydomonas and Spirogyra were placed together le classification did not differentiate between the heterotrophic and the autotrophic green plants, though they also showe difference in their walls composition - the fungi had chiti

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Updated on: Jul 24, 2022