Q1. In many countries, conservationists are trying to design national park systems so that “islands” of natural area (the big parks) are linked by thin “corridors” of undisturbed habitat. The idea is that this arrangement will allow animals and plants to migrate between refuges. Why will such migration be important?

Q2. Elevated doses of acetaminophen are toxic since an oxidized metabolite reacts with and depletes which of the compounds that normally protects the liver and other vital organs?