Selective breeding has been used to produce a variety of wheat with a very high yield. Farmers across a large area all grow this variety. Which is a possible problem with this?
The wheat now contains a gene that was taken from another species.
The wheat can no longer produce seeds that farmers are able to plant.
The wheat needs much more light to photosynthesise than before.
The wheat plants are genetically similar, so one disease could kill many.
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.