Which of the following represents the correct sequence of the levels of organisation within an ecosystem, starting from the largest (most inclusive) level to the smallest (least inclusive) level?
ecosystem→community→population→organism\text{ecosystem} \rightarrow \text{community} \rightarrow \text{population} \rightarrow \text{organism}ecosystem→community→population→organism
organism→population→community→ecosystem\text{organism} \rightarrow \text{population} \rightarrow \text{community} \rightarrow \text{ecosystem}organism→population→community→ecosystem
ecosystem→population→community→organism\text{ecosystem} \rightarrow \text{population} \rightarrow \text{community} \rightarrow \text{organism}ecosystem→population→community→organism
community→ecosystem→population→organism\text{community} \rightarrow \text{ecosystem} \rightarrow \text{population} \rightarrow \text{organism}community→ecosystem→population→organism
67 exam-style questions on OCR GCSE Biology 4.1 Ecosystems, covering 4.1.1 Cycling of materials in ecosystems, 4.1.2 Microorganisms in cycling materials, 4.1.3 The carbon and water cycles, 4.1.4 Factors affecting decomposition, 4.1.5 Levels of organisation in an ecosystem, 4.1.6 Abiotic and biotic factors affecting communities, 4.1.7 Interdependence and competition, 4.1.8 Trophic levels, 4.1.9 Pyramids of biomass, and 4.1.10 Efficiency of biomass transfers. Each one has a worked solution and a mark scheme showing where the marks go.