Question

In which two categories, the organisms are divided on the basis of evolution? How are the two categories different from each other?

Answer 1

Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes that are passed on from parent to offspring during reproduction.

Answer 2

Answer:

On the basis of evolution, the organisms are divided into two categories :

(a) ‘Primitive’ or ‘lower’ organisms

(b) ‘Advanced’ or ‘higher’ organisms

Advanced organisms are the result of gradual development of more complex organisms from the simpler ones i.e., primitive organisms.