AHH THE USABO! I took it last year when I was just taking Biology I as a freshman and didn't move on to the Semifinal Round. I'm taking AP Biology this year and am really worried because our teacher is moving at a very slow pace, so I'm self-studying a lot of stuff for the USABO (and most likely, AP Exam, too). And like "il bandito," I also want to know more about the cut-off score. I think that there is no set qualifying score-it's all based on distributions; two kids from my school advanced to the Semifinal Round last year and they had scores in the 30s, I believe.
PS-For those of you taking AP Biology, how far are you in completing the syllabus? And if you use Campbell's and Reece's textbook, what chapter are you on?
Thanks and good luck to everyone on the USABO!