A farmer rears lambs on pasture during winter. The lambs can move freely between the pasture and a shelter.
The farmer kept the lambs in two groups, A and B, with different shelters. The lambs in both groups ate the same type and mass of food.
| Group | Shelter | Mean increase in body mass per lamb in 4 weeks in kg |
|---|---|---|
| A | Unheated | 3.2 |
| B | Heated | 4.4 |
Calculate the additional body mass gained by a lamb in Group B compared with a lamb in Group A.
Complete the sentence.
In the heated shelter, the lambs in Group B used less of their food to .......... .
The farmer also grows beans. The beans could be eaten by people or fed to the lambs.
Give one reason why using the beans as food for people is a more efficient use of 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.