OCR GCSE Biology A: Gateway Science (J247) · OCR J247
B4 Community level systems
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Community level systems
- A coral reef is an ecosystem where clownfish live among the tentacles of sea anemones. The… (4 marks, Describe)
- Explain how the presence of a keystone species can affect the structure of a community, in… (4 marks, Explain)
- Explain why decomposition is important for the recycling of materials in an ecosystem. (4 marks, Explain)
- Explain how both biotic and abiotic factors can affect the size of a population of rabbits… (4 marks, Explain)
- A woodland ecosystem contains oak trees, caterpillars, blue tits and sparrowhawks. Explain… (4 marks, Explain)
- Describe how the carbon cycle returns carbon dioxide to the atmosphere, referring to the r… (4 marks, Describe)
▶ Practise Community level systems with instant AI marking (free) →