[Q]: Two researches studied adolescents during puberty. Tim studied males, while Dan studied females. Which researcher observed that the growth spurt is triggered by testosterone?
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[A]: Tim

[Q]: Us and Canada are two friendly countries. Canada uses alternative methods to produce electricity while the US use more coal and oil. Both countries recently participated in a Global Warming Council. Which country uses fewer non-renewable resources?
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[A]: Canada

[Q]: Two neighboring gulfs had different geographical features. South gulf has shallow water and is wider, while North gulf is quite deep. Both gulfs are exposed to intense wave activity throughout the year. Which gulf experiences higher swells?
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[A]: South

[Q]: Two friends had unprotected sex with their respective dates on the same night. Everything went fine for both of them. They later found out the bad news. Mike had been infected with HIV. Luckily enough Pete was healthy, he didn't get any diseases. Which friend had a virus that is transmitted by contact with infected blood?
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[A]:
Mike