(a(i))[1]
Name the drug in tobacco smoke that leads to addiction.
(a(ii))[1]
Name a substance in tobacco smoke that is known to cause cancer.
(a(iii))[1]
Name a substance in tobacco smoke that affects the carriage of respiratory gases.
(a(iv))[3]
Explain why a pregnant woman is advised against smoking.
(b)[4]
Describe and explain the relationship, shown in Table 3.1, between the number of smokers and the number of deaths from lung cancer.