A farmer gives equal masses of the same food to two groups of young pigs. One group is kept in warm indoor pens with little room to move. The other group is kept in outdoor paddocks. The pigs in the outdoor paddocks gain less body mass.
Which statement explains why?
Cooler conditions allow more food biomass to be stored instead of transferred away
More energy from the food is used in respiration for movement and for keeping warm
Having little room to move makes the indoor pigs obtain more energy from each gram of food
Moving around converts more of the food directly into muscle biomass
87 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.