Two regions, region A and region B, shared a common border, a river. Region A was favorable for sulfate-reducing bacteria and nitrogen fixing bacteria, while region B was more favorable for the developement of Non-respiratory anaerobes and facultative anaerobes. Which region had less denitrification?
Ans: region B

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

An archipelago in the Indian ocean included two very different islands. Snake island was a reptile paradise, inhabited by many species of reptiles. Bird island had few reptiles on it, but had various birds inhabiting it. Which island was inhabited by more lizards?
Ans: Snake

John was studying the species in African Savannah. He noticed that elands, which is a prey animal, are basically nocturnal. On the other hand, wild boars, another prey animal, are not nocturnal. Would wild boars be less or more active at night than elands?
Ans: less