Question

Explain merits and demerits of Whittaker's Whittaker's Classification. ​

Answer 1

Answer Answer:

Answer:Merits of R. H. Whittaker Kingdom Classifications

1., This system of classification looks more scientific and natural because of the following considerations:

2. It is largely the most accepted system of modern classification mainly because of the phylogenetic placing of different groups of living organisms

3. Separation of prokaryotic into a independent kingdom is justifiable because they differ from all other organisms in their general organization.

4. Grouping of all unicellular eukaryotes under the kingdom Protista has solved many problems, particularly related to the position of organisms like Euglena.

Demerits of R. H. Whittaker Kingdom Classification·

1. The five-kingdom classification has certain drawbacks also, particularly with reference to the lower forms of life.· 2. The kingdoms Monera and Protista include diverse, heterogeneous forms of life. In both the kingdoms there are photosynthetic (autotrophic) as well as non-photosynthetic (heterotrophic) organisms. Both the kingdoms include organisms which have cells with cell wall as well as without cell wall.·

3. None of the three higher kingdoms include a single ancestor of all its forms.

of the three higher kingdoms include a single ancestor of all its forms. 4. Multicellular lines have originated from protistans several times.

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Answer 2

1) The classification system that Whittaker adapted is totally based on scientific foundation .

2) Prokaryotes are placed separately in a different kingdom . The Prokaryotic organisms are different from other organisms , thus placing them separately is justified.

3) All unicellular eukaryotic organisms are cubbed together in one kingdom named, protista. This has helped to solve the placement of euglena.

4) Euglena has chloroplasts like plants but as animals it has flagella and thus there was conflict about such species during the previous Classification systems. it was placed in Protozoa previously.

5) Fungi are saphrophytic and hence they are placed separately in a unique kingdom .

6) According to five kingdom Classification, the cell structure , organization of cell , node of nutrition , lifestyle and phylogenetic relationship are taken into consideration.

7) Therefore , the system of 5 kingdom classification becomes most authentic system of biological classification.