This exam focus covers Exam Focus within Ecosystems Communities for GCSE Biology. Topic 1: Ecosystems Communities It is section 13 of 15 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 13 of 15
Practice
15 questions
Recall
20 flashcards
Exam Focus
Frequently ExaminedEcosystems and communities appear regularly on AQA Paper 2, typically in 2-mark definition questions and 4-6 mark extended response questions on interdependence and food webs. Key question patterns include:
- Definition questions (1-2 marks): "State the difference between a population and a community" — use the one-species vs all-species distinction precisely.
- Interdependence questions (4-6 marks): "Explain how removing species X would affect species Y and Z" — always trace the full chain of effects with clear causal language ("because", "therefore", "as a result").
- Abiotic/biotic factor questions (2-3 marks): Identify whether a given factor is abiotic or biotic and explain how it affects a named organism.
- Food web analysis (3-4 marks): Predict population changes from a change to one species — always consider both predators AND prey of the species affected.
Common mark-losing errors: Defining ecosystem as only the living things; forgetting abiotic components; tracing only one direction of effect in interdependence questions; confusing population with community.