Ten randomly placed quadrats each have an area of 0.25 m2. They contain a total of 30 plantains. The lawn has an area of 80 m2.
What is the estimated number of plantains in the lawn?
240240240
320320320
960960960
960096009600
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.