So what is exactly is on the SAT II Biology?

I would like to begin by saying I have looked on the CollegeBoard website and searched Google for resources. I also have the Barron’s book. However, I guess what I’m hoping for is, what about the real test? From people who have taken the exam, what are the heavier topics? I took AP Biology, but the nine classes of animals, human, plant, and animal physiology weren’t covered at all. It may seem redundant, but what I am trying to ask is, what is everyone’s experience? What topics were hardest? Furthermore, is it true that the test is mostly just memorization of biology knowledge? Also, any tips on study resources beyond the Barron’s book?