Question

Define evolution. Why are traits acquired during the lifetime of an individual not inherited?

Answer 1

Evolution means 'descent with modification'. It simply means that the present day complex organisms have originated from the earlier simpler forms of life during the course of ages by the process of gradual change. During reproduction, variations arise either because of errors in DNA copying or as a result of sexual reproduction. Let us study an example to look at some consequencies of arising of variations in an attempt to explain how evolution occurs.