Biology (Separate Science) · GCSE · Edexcel · Edexcel Level 1/Level 2 GCSE (9–1) in Biology (1BI0) (Higher) · Specification point · 9.11B · Ecosystems and material cycles
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Students should:
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9.11B Describe the biological factors affecting levels of food security, a increasing human population b increasing animal farming and the increased meat and fish consumption c the impact of new pests and pathogens d environmental change caused by human activity e sustainability issues, e.g. use of land for biofuel production and the cost of agricultural inputs | 2c 4a, 4c |
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9.12 Describe how different materials cycle through the abiotic and biotic components of an ecosystem |
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9.13 Explain the importance of the carbon cycle, including the processes involved and the role of microorganisms as decomposers
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9.14 Explain the importance of the water cycle, including the processes involved and the production of potable water in areas of drought including desalination |
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9.15 Explain how nitrates are made available for plant uptake, including the use of fertilisers, crop rotation and the role of bacteria in the nitrogen cycle |