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6.2 Feeding the human race

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Question 22

Armyworms are major agricultural pests that feed on barley crops.

  • One armyworm caterpillar can eat 1.2 g1.2\text{ g}1.2 g of barley leaves in a single day.
  • A severe infestation in a region is estimated to have a population of 6,500,0006,500,0006,500,000 caterpillars.

Calculate the total mass of barley leaves, in kilograms (kg\text{kg}kg), that this population of armyworms eats in a day.

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[3]
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6.2 Feeding the human race Questions

  1. GCSE
  2. /Biology
  3. /6.2 Feeding the human race

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.

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