[Q]: Joe studied the lives of humans. He studied 2 groups of people. Group G had people over 65 in it, and group Y had people under 65 years old in it. Which group had more people that were retired from work?
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[A]: Group G

[Q]: Two brothers went on vacation. Tom partied heavily, and found out that he was infected with the HIV virus. Tim was more moderate, he went to the beach to get a sun tan, but he got an infection as well. Tim found out he got a bacterial infection and had to take antibiotics. Which brother had a greater chance of developing AIDS?
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[A]: Tom

[Q]: Two groups of students learned about protozoa for a school project. Group P studied more about predatory protozoa, while group G studied about grazing and parasitic protozoa, plus portozoa as food sources. Which group learned less about protozoa keeping bacterial populations in check?
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[A]: group G

[Q]: Patty was a runner and liked hiking so she spent a lot of time outdoors. Her friend Fay sealed up her home and spent most of her time indoors. Both friends lived in an area with moderate to high levels of air pollution and attended a seminar where they learned more about the impact of air pollution on human health. Which friend was exposed to more indoor pollution?
****
[A]:
Fay