A farmer rears lambs for meat in large, unheated enclosures. Each lamb is given the same mass of food each day. The farmer can change the enclosure size and use heating.
Which housing plan would allow the greatest proportion of the food to become new body tissue?
Keep the lambs in smaller, unheated enclosures, as colder surroundings reduce the transfer of energy from the lambs
Keep the lambs in larger, unheated enclosures, as greater movement turns more of the food directly into muscle tissue
Keep the lambs in larger, heated enclosures, as movement develops more body tissue and heating supplies energy for growth
Keep the lambs in smaller, heated enclosures, reducing respiration for movement and biomass loss from keeping warm
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.