Scientists test a GM crop that produces an insect toxin. Equal numbers of pest insects and non-target insects are exposed to each crop under identical conditions.
Table
| Crop | Pest mortality / % | Non-target mortality / % |
|---|---|---|
| Non-GM | 10 | 8 |
| GM | 70 | 9 |
Which conclusion is best supported?
The GM crop has a greater observed effect on non-target mortality than on pest mortality.
The GM crop has a greater observed effect on pest mortality than on non-target mortality.
The GM crop kills only pest insects because non-target mortality is less than ten per cent.
The GM crop has no effect on pest insects because some pests survive exposure to the crop.
44 exam-style questions on Edexcel GCSE Biology 4.3 Selective breeding and genetic modification, covering 4.3.1 Selective breeding and its impact, 4.3.2 Tissue culture, 4.3.3 Genetic engineering overview, 4.3.4 Main stages of genetic engineering, 4.3.5 Advantages and disadvantages of GM organisms, 4.3.6 Agricultural solutions for a growing population, and 4.3.7 Evaluating genetic engineering and breeding. Each one has a worked solution and a mark scheme showing where the marks go.