@meeginvee I took the Kaplan course last year, but I don't know if they may have changed much for Biology. I got a 20 in Biology last time I took it using Kaplan. Kaplan bio is good no doubt, but there are certain things they missed and don't cover. I think there were probably 5 questions in the bio section that I really did not know and they were no where to be found in Kaplan. Had I known about those 5 questions, I would definitely have gotten a 30.
Kaplan covers a lot of the physio in the biology section and you might also see that in Feralis and some in Cliffs, which is why it may be good. However, Kaplan Biology's lack of nitty-gritty details is where the damage can be done to your score and that's why I wish I used other stuff last time. If you are using other stuff like Cliffs, Feralis, bootcamp, destroyer, and other stuff then I am positive that you'll get 20+ hands down! Just keep reviewing your notes for all the sections and take it easy the day before the test.
Edit: I do have kind of have a strong bio background, so I can't speak 100% on how you'll do, but if you feel that you know your stuff in and out, then I'm positive you'll do great. Just keep reviewing your stuff!