David is a chemist, working for a large pharmaceutical company. He was contemplating on a project that would help perform chemical reactions more efficiently. For that, he conducted two chemical reaction tests, test A and test B. In test A he used enzymes, but in test B he didn't use any enzymes. He now needs to evaluate the pros and cons of each of the tests. Would test A produce more or less waste products than test B?
Ans: less

Bay city practiced organic farming and used almost no fertilizers. Gulf city practiced conventional farming for it inhabitants, and used vast quantities of fertilizers. Which city caused the entry of more livestock waste into the ocean?
Ans: Gulf

The Jones family had a history of chronic viral infections. Jenny got human papillomavirus, while her brother Josh got infected with the EpsteinBarr virus. They were both under treatment. Which sibling had a higher risk of developing Burkitt's lymphoma?
Ans: Josh

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 didn't have to consider antiretroviral drugs?
Ans: Tim