During one afternoon, a team surveys six areas across a salt marsh. Glasswort plants, mud snails and shore crabs are found in every area.
The team reports that the salt marsh has a stable community.
Which statement about the team's report is correct?
The report is supported because recording several species together shows that their populations are balanced.
The report is unsupported because several species living together form an ecosystem rather than a community.
The report is unsupported because one afternoon gives no evidence that population sizes stay roughly constant over time.
The report is supported because finding each species across the salt marsh shows that population sizes are constant.
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.