Explain by giving three reasons, how work done by earlier scientists with respect to classification is helpful to the present generation.

Ans. The work done by earlier scientists or their obsolete theories is useful even for students of this generation. It is because :

(i) The basic need for classifying organisms is to bring about order and organisation.

(ii) Classification also gives the relationships between organisms.

(iii) Classification also has predictive value. Classifying an organism in a category on the basis of external morphology immediately enables us to predict its internal structure on the basis of what we already know about the group.

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