<p>I have signed up to take the Biology and Chemistry SAT II's this Saturday. I was just wondering if it was possible to take a third one even though I did not sign up for it when I registered for those two. I suppose College Board would just send the bill, but I just want to make sure.</p>
<p>Also, regarding Biology (going to be Ecology) and Chemistry, how would you guys compare Princeton Review to the real test? Is it harder or easier? Furthermore, if you have any suggestions on particular areas to review, I would appreciate it. Thanks.</p>
<p>Signing off...</p>
<p>TheEvenPrime2</p>