Question 47
The five events are: variation among individuals; some variation is inherited; advantageous features increase survival; survivors are more likely to reproduce and pass on their genes; advantageous gene variants become more common over generations. In nineteenth-century England, soot darkened bark and killed pale lichens. Birds more easily saw pale moths on dark bark; dark wing colour was inherited. Look back at the list of five events that summarise the theory of natural selection. Use this list to explain how natural selection caused dark peppered moths to become more common than pale peppered moths, during the late nineteenth century in England.
