The table shows feeding relationships between organisms in a coastal ecosystem.
| Consumer | Organism eaten |
|---|---|
| limpet | microscopic algae |
| crab | limpet |
| fish | limpet and crab |
| seal | fish and crab |
| orca | seal |
Which organism is the apex predator? Justify your answer using the feeding information.
103 exam-style questions on AQA GCSE Biology 7.4 Trophic levels in an ecosystem, covering 7.4.1 Trophic levels, 7.4.2 Pyramids of biomass, and 7.4.3 Transfer of biomass. Each one has a worked solution and a mark scheme showing where the marks go.