<p>So I emailed alot of professors about starting research. right now i'm an undergrad. and I"ve gotten responses from quite a few who are interested in meeting with me. I was wondering, if you meet and everything goes well, are you automatically in? and how would I choose between the different professors? do they get angry if you intially show alot of interest but then end up going to a different lab, how would you explain your reason for working in a different lab?</p>