Which method is most suitable for investigating how plant abundance changes from open grassland into woodland?
counting plants in one quadrat at the woodland edge
counting plants in quadrats chosen beside a footpath
counting plants at fixed intervals along a belt transect
counting plants in quadrats containing the most species
39 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.