Problem: Mike lives in a cold mid-western city, where there is not much predator prey interaction. Mike noticed that in his city some squirrels have darker coat, while others have lighter coat. He also knew that darker coats are more suitable in cold environment with less predator prey interaction. He started thinking why the squirrels developed different coat colors. Which squirrels would have smaller chance of survival, lighter or darker?

A: lighter

Problem: Barbara and Jane are two students. They both like meteorology. Barbara studies the formation of the ozone layer, while Jane studies about the stratosphere. Which student learned more about radicals combining with molecular oxygen to form ozone?

A: Barbara

Problem: Two botanists had different interests, Mike studied only trees and flowers, while Chris was fascinated with studying fungi. Which botanist learned more about enzymes breaking down living tissue?

A: Chris

Problem: John and Mary were studying insects. John liked to study insects that never eat, while Mary decided to study insects that are very healthy eaters. Which person studied less about mayflies?

A:
Mary