Which row gives one benefit and one challenge of maintaining biodiversity?
benefit: medicines may be found in wild plants; challenge: countries may not agree on schemes
benefit: fewer species compete for the same food; challenge: countries may not agree on schemes
benefit: medicines may be found in wild plants; challenge: ecotourism brings money to the area
benefit: more land is freed up for farming crops; challenge: conservation schemes are hard to check
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.