Answers:
Depending on the tooth and the wound.
I know that when I get my knowledge teeth removed, I be prescribed an antibiotic. The reasoning is,
when you acquire a tooth removed (I am assuming full-size teeth) nearby is a gaping hole that can be prone to infections. So near an antibiotic; you and the dentist will be assured that near is no foul infection while you're curative.
I get mine pulled and have to purloin Penicilin (however you spell that) and Vicodine for close to a week. They didn't do much, but they be prescribed.
Yes. Like Obsidian A said, pulling a tooth leaves a nice hole inside an enviroment suited for growing germs. All the dentists I've particular own prescribed antibiotics to support your body elude anything that might try to grow down in the socket.