A population of mice contains light and dark individuals. Fur colour is inherited. A fire leaves the ground darker. Birds hunt the mice by sight. Which sequence explains a later increase in dark mice?
Dark mice survive more often and pass on colour alleles.
Light mice survive more often and pass on colour alleles.
Dark mice become lighter and pass on acquired colour changes.
Light mice become darker and pass on acquired colour changes.
44 exam-style questions on Edexcel GCSE Biology 4.1 Evolution and natural selection, covering 4.1.1 Work of Darwin and Wallace and 4.1.2 Resistant organisms and evolution. Each one has a worked solution and a mark scheme showing where the marks go.