Problem: Two farms used AM fungi for the plants. Brown farm also decided to grow cover crops on those parcels of land to help mycorrhizal growth. Orange farm didn't grow cover crops. Which farm provided extended time for AM fungi growth into the spring?

A: Brown

Problem: Two identical planets, Norlon and Bothar, have been discovered in a neighboring galaxy of ours. These two planets have the same type of atmosphere as Earth and are extremely similar to Earth in terms of topography and even species of animals that live on them. The main difference is that Norlon is inhabited by a species very similar to humans that emit a lot of carbon dioxide into the atmosphere. Bothar, however, has no such species on its planet. Does Bothar have more or less natural habitats than Norlon?

A: more

Problem: Quebec recently removed a large area consisting primarily of forests in order to make room for a new housing development. On the other hand, Montreal recently finished planting a large amount of new trees as part of an environmental initiative project. Which area will remove higher levels of carbon dioxide from the air, Montreal or Quebec?

A: Montreal

Problem: Matt and his brother Jesse are twins. They look almost identical. If it weren't for the fact that Jesse has a slightly darker skin complexion you wouldn't be able to tell them apart. In fact one year Matt was out in the sun for a long time and picked up a bit of a tan so they actually did look exactly alike. Will exposure to UV light increase or decrease the amount of melanin produced?

A:
increase