Some farmers grow cotton that has been genetically engineered to be resistant to insect pests. The table shows data from farms growing two types of cotton. Table
| Type of cotton | Mean yield in tonnes per hectare | Mean mass of pesticide used in kg per hectare |
|---|---|---|
| Non-GM cotton | 2.0 | 12.0 |
| GM insect-resistant cotton | 2.6 | 4.5 |
| Which statement is correct? |
The GM cotton had a 23%23\%23% higher yield and used 62.5%62.5\%62.5% less pesticide.
The GM cotton had a 30%30\%30% higher yield and used 38%38\%38% less pesticide.
The GM cotton had a 30%30\%30% higher yield and used 62.5%62.5\%62.5% less pesticide.
The GM cotton had a 23%23\%23% higher yield and used 38%38\%38% less pesticide.
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.