Biology 5090 · O Level · Disease

Disease — practice question

Malaria can be controlled through the use of mosquito nets treated with insecticide and placed over beds. Using these bed nets lowers the number of bites from infected mosquitoes. The graph illustrates the effect of using bed nets on the average number of mosquito bites in a group of people. Which conclusion can be drawn from these data?

  • AMosquitoes bite more during the evening than after midnight (00:00).
  • BUse of bed nets prevented mosquito bites.
  • CUse of bed nets had a greater impact after midnight (00:00) than before midnight.
  • DThe maximum number of mosquito bites occur between 01:00 and 02:00.

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