Which of the following factors causes a population to experience the founder effect?

According to Darwin's theory of evolution,differences between species occur due to:

You have studied the story of Peppered moths in England. Had the industries been removed, what impact would it have had on the moth population? Discuss.

The peppered moth $(Biston \text{ } betularia)$, the black-coloured form became dominant over the light-coloured form of moth in England during the industrial revolution. This is an example of

The idea of natural selection as the fundamental process of evolutionary changes was reached:

Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?