Applying lemon eucalyptus oil to the skin is thought to reduce the chance of being bitten by biting midges.
Design an investigation to find out if people who have applied lemon eucalyptus oil are less likely to attract midges than people who have not applied the oil.
Your answer should include experimental details and be written in full sentences.
31 exam-style questions on Edexcel IGCSE Biology The organism in the environment. Each one has a worked solution and a mark scheme showing where the marks go.