Two groups of pigs are reared to the same final body mass. One group is kept in warm housing and the other group is kept in colder housing. Why does the group in colder housing need a greater mass of food?
A larger proportion of food biomass is lost while the pigs keep their bodies warm
A larger proportion of food biomass is converted into tissue that people can eat
A smaller proportion of food biomass is used in respiration by the pigs' muscles
A smaller proportion of food biomass is lost from the pigs to their surroundings
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.