Limpets, barnacles, crabs and seaweeds live on a sea wall.
Which of these is a population?
All the limpets, barnacles, crabs and seaweeds on the sea wall
The organisms on the sea wall with the rock and seawater
A single limpet attached to a rock on the sea wall
All the limpets of one species on the sea wall
82 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.