One role of the Centers for Disease Control and Prevention (CDC) in Atlanta, US, is to reduce the number of people infected by pathogens. The CDC carried out a survey in which women were asked which contraceptive methods, if any, they used. Fig. 4.1 presents the survey results.
(a)[3]
Suggest why the CDC gathered data on contraceptive methods.
(b(i))[2]
State two hormones that occur in contraceptive pills.
(b(ii))[3]
Suggest why contraceptive pills do not include FSH.
(b(iii))[1]
Give one example of ‘other chemical methods’ (fourth bar) that could be added to the bar in Fig. 4.1.
(b(iv))[2]
State two birth control methods that were not included in the survey.
(b(v))[1]
Suggest why the percentage of women who used any type of contraceptive method (first bar) does not match the total of the last three bars.
Worked solution & mark scheme
This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: “many diseases / infections are spread by sexual contact” …