Scientists have described many species of ground beetle that look very similar to each other but live in different habitats, such as woodland, grassland and sand dunes.
How did the theory of evolution by natural selection explain the existence of these similar species?
Each similar species was created separately and has stayed the same ever since.
Individual beetles evolved during their own lives to suit the habitat they lived in.
Genes and DNA showed how the beetles inherited their similar features from parents.
Similar species descended from a common ancestor and became adapted to different habitats.
85 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.