I have an AP Bio Exam tommorow

Study, eat well, and get a good night's sleep.

Why study. At this point you know it or you don't. (Study only a particular weak area if you feel you need to).

Bio is a good one to pass. Easily 5 credit hours at any university. (AP test not just a final right?). Saves you a lot of time from taking a useless course in college. But if you don't pass, don't worry about it. I had plenty of friends who didn't pass. It is just one test and trust me things will be fine.

I'm not sure how I passed, but literally just write anything. Even if you are making it up or pulling it out of nowhere. I had an essay on Nitrogen bridges or something and had to just pull from far memory or something.

Hope you did well.