Zoology - Evolution Question with Solution | TestHub

Mutation: Mutations are also known as discontinuous variations. Experiments on microbes show that pre-existing advantageous mutations help the organisms to get selected and the result is observed in new phenotypes. This may lead to speciation over a few generations. The concept of discontinuous variation was given by Hugo de Vries.

Darwinism consider the accumulation of small, directional and continuous variation among the organisms of a species that results in speciation gradually.