Rabbits eat grass. Beetles also eat the grass. Owls eat the beetles but do not eat rabbits.
A pathogen kills many rabbits. It cannot infect the other organisms. Assume that changes in food availability have the greatest effect on their populations.
Which pair of population changes is most likely after the grass has responded?
Fewer beetles; fewer owls.
More beetles; fewer owls.
Fewer beetles; more owls.
More beetles; more owls.
63 exam-style questions on AQA GCSE Biology 7.1 Adaptations, interdependence and competition, covering 7.1.1 Communities, 7.1.2 Abiotic factors, 7.1.3 Biotic factors, and 7.1.4 Adaptations. Each one has a worked solution and a mark scheme showing where the marks go.