<p>Have you taken any biology classes at school? AP Biology or anything.</p>
<p>I strongly suggest you read the Campbell Biology textbook and know the material in it WELL. Not just general concepts, but also details. (I never took the USABO but I know several people who made it to semifinals and a finalist who made it the camp.) How long you need to study depends on you. But it surely wouldn’t hurt to start early.</p>
<p>Check out this thread for some advice from past USABO’ers: <a href=“http://talk.collegeconfidential.com/sciences/1355881-official-2013-usabo.html[/url]”>http://talk.collegeconfidential.com/sciences/1355881-official-2013-usabo.html</a></p>