Food kept in a fridge decays more slowly than food left in a warm room.
Which statement explains why?
The low temperature slows down the enzymes in the microorganisms.
The low temperature kills all of the microorganisms on the food.
The low temperature removes the water that microorganisms need.
The low temperature stops oxygen from reaching the microorganisms.
111 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.