of R. H. Whittaker 5 KINGDOM Classification·          This system of classification looks more scientific and natural because of the following considerations: ·          It is largely the most accepted system of modern classification mainly because of the phylogenetic placing of different groups of living organisms ·          Separation of prokaryotes into an independent kingdom is justifiable because they differ from all other organisms in their general organization. ·          Grouping of all unicellular eukaryotes under the kingdom Protista has solved many problems, particularly RELATED to the POSITION of organisms like Euglena. ·          ELEVATION of the group fungi to the status of a kingdom is justifiable since fungi totally differ from other primitive eukaryotes like algae and protozoans. ·          The kingdoms plantae and animalia are now more HOMOGENEOUS groups than they were in the two kingdom classification as it shows the phylogeny of different life styles. ·          The five-kingdom classification gives a clear indication of cellular organization and modes of nutrition, the characters which appeared very early in the evolution of life.