O-LevelBiologyEcology & Environment5090/12 · Oct/Nov 2023 · Q201 Mark
Malaria can be controlled by the use of mosquito nets treated with insecticide, placed over beds. The use of these bed nets reduces the number of bites by infected mosquitoes. The graph shows the impact of the use of bed nets on the average number of mosquito bites in a group of people. [Figure 20.1] Which conclusion can be drawn from this data?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
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.
✓ Correct answer
C: Use of bed nets had a greater impact after midnight (00:00) than before midnight.
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