Unmodified barley gives a low yield in fields with salty soil. Scientists insert a gene that increases salt tolerance into barley. The modified crop will be grown close to wild barley.
Which pair identifies the outcome supported by the modification and the environmental check most relevant to this site?
A higher barley yield on the salty soil; whether repeated cultivation selects insect pests resistant to the modified crop.
A lower need for broad-spectrum insecticide; whether repeated cultivation selects insect pests resistant to the modified crop.
A higher barley yield on the salty soil; whether the inserted allele is transferred by pollen to wild barley.
A lower need for broad-spectrum insecticide; whether the inserted allele is transferred by pollen to wild barley.
100 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.