AQA GCSE Biology (8461) · AQA 8461
4.7 Ecology
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Ecology
- Explain how the use of GM crops can help to improve food security in countries that experi… (4 marks, Explain)
- Mycoprotein can be produced using the microorganism Fusarium. Describe how mycoprotein is … (4 marks, Describe and Explain)
- Explain why eating food from higher trophic levels is less efficient for feeding large hum… (4 marks, Explain)
- Explain how the introduction of a non-native predator species to an island can reduce the … (4 marks, Explain)
- Explain how pollution of a river with fertilisers from farmland reduces biodiversity in th… (4 marks, Explain)
- Explain how interdependence between organisms in a community means that a change in one po… (4 marks, Explain)
- Explain how red foxes and grey wolves compete with each other in a woodland ecosystem, and… (4 marks, Explain)
- Explain how a deep-sea hydrothermal vent bacterium is adapted to survive in its extreme en… (4 marks, Explain)
- Explain how structural and behavioural adaptations help a polar bear survive in its Arctic… (4 marks, Explain)
- Explain how a cactus plant is adapted to survive in a hot desert environment. (4 marks, Explain)
- Explain why two species of oak tree growing in the same woodland are more likely to compet… (4 marks, Explain)
- Explain why the number of organisms at each trophic level decreases as you move along a fo… (4 marks, Explain)
- Describe how decomposers return carbon and mineral ions to the environment, and explain wh… (4 marks, Describe)
- Explain why a community of organisms depends on producers for survival. (4 marks, Explain)
- Explain why a stable community contains both producers and decomposers. (4 marks, Explain)
- Explain how deforestation reduces biodiversity. (4 marks, Explain)
- Explain how the use of peatlands as a source of garden compost reduces biodiversity. (4 marks, Explain)
- Explain how overgrazing by cattle reduces biodiversity in a grassland ecosystem. (4 marks, Explain)
- A farmer decides to rear cattle for beef rather than growing wheat to sell directly as foo… (4 marks, Explain)
- Explain why the biomass available at each trophic level decreases as you move up a food ch… (4 marks, Explain)