Chickens kept in small heated sheds gain more body mass than free-range chickens given the same mass of food.
Which statement explains why?
Less energy is transferred to the surroundings, so more food goes into growth
The chickens respire faster, so they turn more of their food into biomass
The chickens are warm and still, so they are able to eat more of their food
Less food is wasted in the shed, so the chickens need to respire less often
42 exam-style questions on AQA GCSE Biology 7.5 Food production, covering 7.5.1 Factors affecting food security, 7.5.2 Farming techniques, 7.5.3 Sustainable fisheries, and 7.5.4 Role of biotechnology. Each one has a worked solution and a mark scheme showing where the marks go.