Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statement taking any two examples.

Answers (1)

Ans. This is true that biological classification is a dynamic and ever-evolving phenomenon which keeps changing our understanding of life forms.
                    

Biological classification is forever changing. Initially, living beings were only categorised as animals and plants. This was on the basis of the morphological attributes. Then scientists figured out certain misleading information in the categorisation method and came up with better classifications. The five-kingdom theory is the most universally accepted theory in today world.
                    

This theory by Whittaker classifies living beings on the basis of structural organisation and phylogenetic relationship; According to this theory; all prokaryotes are classified under one kingdom, i.e. Monera. Eukaryotes are classified into four kingdoms. All the photosynthetic autotrophs are categorised under the plant kingdom, and all the eukaryotic heterotrophs (without a cell wall) are classified as the animal kingdom. However, there are limitations in even this method of categorisation.          

For example, the chemosynthetic autotrophs are classified under the kingdom Protista. Lately, some scientists have also claimed that there should be three domains of life, and some have even proposed a Six-Kingdom categorisation.

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