Scientists want to find out how the types of plant change from the edge of a pond to the middle of a field next to it.
Which sampling method should they use?
placing quadrats at random positions across the whole area
collecting plants from the edge of the pond only, using a pooter
marking plants and counting them again using capture-recapture
placing quadrats at regular intervals along a transect line
109 exam-style questions on OCR GCSE Biology 6.1 Monitoring and maintaining the environment, covering 6.1.1 Field investigation of distribution and abundance, 6.1.2 Human interactions and biodiversity, 6.1.3 Maintaining biodiversity, and 6.1.4 Environmental change and distribution of organisms. Each one has a worked solution and a mark scheme showing where the marks go.