A village has one field available for producing food. The field can be used in either of two ways.
| Use of the field | Food energy available to people each year (MJ) |
|---|---|
| Peas are eaten directly by people | 40 000 |
| Peas are fed to goats and people consume the meat and milk | 8 000 |
Each person requires 4 000 MJ of food energy each year from this field. In the future, 9 people will depend on the field.
Explain which use of the field would provide enough food energy for the future population. Use the data and your knowledge of energy transfer.
127 exam-style questions on OCR GCSE Biology 6.2 Feeding the human race, covering 6.2.1 Biological factors affecting food security, 6.2.2 Agricultural solutions to growing demand, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, 6.2.5 Steps in genetic engineering, 6.2.6 Benefits and risks of gene technology in agriculture, and 6.2.7 Biotechnological solutions to growing demand. Each one has a worked solution and a mark scheme showing where the marks go.