Select the appropriate option for $Saltation$.

Neo-Darwinism believes that new species develop from which of the following?

While creation and presence of variation is directionless,natural selection is directional as it is in the context of adaptation. Comment.

Variations caused by mutation,as proposed by Hugo de Vries,are

Any change in gene frequency in a population is called ......

Which of the following is $NOT$ involved in the modern synthetic theory of evolution?