Food that is kept in a freezer decays very slowly. Which statement explains why?
The low temperature slows down the enzymes in decay microorganisms
The low temperature denatures the enzymes in decay microorganisms
The low temperature kills all of the decay microorganisms in the food
The low temperature removes all of the water from inside the food
40 exam-style questions on AQA GCSE Biology 7.2 Organisation of an ecosystem, covering 7.2.1 Levels of organisation, 7.2.2 How materials are cycled, 7.2.3 Decomposition, and 7.2.4 Impact of environmental change (HT only). Each one has a worked solution and a mark scheme showing where the marks go.