<p>Umm, you do know that the test will have 60 questions with stuff from both E and M, right? </p>
<p>It's only the last 20 questions that are purely Ecology or Molecular.</p>
<p>You have to study everything to be safe, and study slightly more for whichever section you want to do for the last 20 questions. I was going to do M, but still memorized all the characteristics of each Phlyum (it was hell!) for the first 60 questions in case it came out (which it did!)</p>
<p>I would say DON'T BUY/USE the Princeton Review book. It has outdated information and some of it is, in fact, inaccurate. I found that Barrons was the best - covered everything, nice amount and depth of review questions after each topic to practice on, and the material was well presented. It helped me get a decent 750. :)</p>
<p>I agree with the above. Study everything (they have very specific questions). I took the E part, and I heard it was easier than M. It was pretty easy.</p>
<p>I used Barrons (for SAT II Bio E/M) and Cliffs (for AP Bio). Took Bio M after covering 1/3 of AP Bio class, and got a 760. I studied A LOT!!!! </p>
<p>As for taking M or E, it depends on what material you are more comfortable with. Go through your prep/review books and see what information you think you know more about.</p>
<p>According to my AP Bio teacher, take M if you're really comfortable with some of the more specific molecular aspects (like cellular respiration). We kind of went over stuff like cellular respiration or photosynthesis with such scrutiny, that he said the details wouldn't be much of a problem. They would most likely be stuck in our brains. E covers some more general material, and is kind of easier to study for. But the M or E tests are not strictly about molecular/ecology stuff (I think).</p>
<p>I took the SAT Bio test last October (kind of screwed up in terms of registration last spring), and chose to take E even though I normally was less comfortable with ecology than with molecular stuff. Given how I forgot some stuff from AP Biology, it was easier to take E for me at that time. As Jenife said, it is more logic-based.</p>