A farmer adds much more fertiliser to a field than the crop can use. Which is the most likely result?
The crop grows much faster because it absorbs all of the extra ions.
The crop plants die because their roots take in too much water.
The extra fertiliser kills all of the pests that live in the soil.
The extra fertiliser washes into rivers and harms aquatic life.
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.