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6.2 Feeding the human race

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Question 10

Desert locusts (Schistocerca gregaria) are a major threat to food security and agricultural production, particularly in Africa and Asia.

  • A single adult desert locust can consume 2.0 g2.0\text{ g}2.0 g of green vegetation in a single day.
  • A swarm of locusts in a certain agricultural region is estimated to have a population of 45,000,00045,000,00045,000,000 locusts.

Calculate the total mass of vegetation, in tonnes (t\text{t}t), that this swarm of locusts eats in a day.

(1 tonne=1,000 kg1\text{ tonne} = 1,000\text{ kg}1 tonne=1,000 kg)

Show your working.

[3]
Markscheme

6.2 Feeding the human race Questions

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

25 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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