Two areas of a disused quarry contain different plant communities. Measurements show that temperature and light intensity are similar in both areas.
An ecologist suggests that other non-living conditions may explain the difference. Give two measurements that could be made to investigate this suggestion.
82 exam-style questions on Edexcel GCSE Biology 9.1 Ecosystems and interdependence, covering 9.1.1 Levels of organisation in ecosystems, 9.1.2 Abiotic and biotic factors, 9.1.3 Importance of interdependence, 9.1.4 Parasitism and mutualism, and 9.1.5 Determining number of organisms in an area. Each one has a worked solution and a mark scheme showing where the marks go.