SAT II Biology E/M E or M?

<p>ive registered SAT II Biology E/M, but i dont know how do you choose E or M, i want to choose M since im a more theoretical person. Do you choose what you want to take on the day you go to test or do you choose it somewhere else?? i didnt see anyplace to choose E or M.</p>

<p>If you take AP Bio, I would suggest M.</p>

<p>i took H bio, but the question is , how do you choose to take M or E??</p>