Problem: Tim and Dan both studied reproduction in college. Dan studied plant reproduction while Tim studied fish reproduction. Which person studied less about the way fish reproduce?

A: Dan

Problem: The biologists found out that the Indian Ocean had a lower water pH than it did a decade ago, and it became acidic. The water in the Arctic ocean still had a neutral to basic pH. Which ocean has a lower content of carbon dioxide in its waters?

A: Arctic

Problem: In the town of Hawkings they get all of their power from a Nuclear power plant. Across the country another town called Gideon relies solely on the burning of fossil fuels. Gideon intents to switch to nuclear power soon. Which town produces more air pollution, Gideon or Hawkings?

A: Gideon

Problem: Mike and John are brothers. Their dad sent them to the doctor's office to get tested for hepatitis because Mike was feeling sick all the time. It turned out Mike has hepatitis B, while John doesn't. Which brother had a disease of the liver?

A:
Mike