A farming cooperative compares an unmodified sorghum variety with a genetically modified variety that has increased iron content.
| Sorghum variety | Iron content / mg per kg of harvested grain | Mean yield / tonnes per hectare | Harvested grain usable after storage / % |
|---|---|---|---|
| Unmodified | 20.0 | 5.00 | 88.0 |
| GM | 32.0 | 4.20 | 95.0 |
Calculate the additional mass of iron per hectare that would remain in usable grain from the GM variety compared with the unmodified variety.
Give your answer in grams.
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.