Workers P and Q have lived beside the same polluted road for 20 years. P develops lung disease, but Q does not.
Which additional finding best explains the different outcomes?
P has experienced less air pollution than Q.
Q also has long-term exposure to occupational dust.
P also has long-term exposure to occupational dust.
P and Q have the same history of smoking.
102 exam-style questions on Edexcel GCSE Biology 5.4 Non-communicable diseases, covering 5.4.1 Interaction of factors in non-communicable disease, 5.4.2 Lifestyle factors and non-communicable disease, and 5.4.3 Treatments for cardiovascular disease. Each one has a worked solution and a mark scheme showing where the marks go.