A grower releases parasitic wasps into a glasshouse to control whitefly. The table shows the numbers recorded during the next four weeks.
| Week | Whitefly larvae counted | Parasitic wasps counted |
|---|---|---|
| 1 | 240 | 10 |
| 2 | 160 | 35 |
| 3 | 80 | 55 |
| 4 | 110 | 30 |
Explain the changes in the numbers of whitefly and parasitic wasps. Predict what may happen to crop damage in week 5.
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.