If you can remember everything in the bio section of the Kaplan book you are guaranteed at least a 22 or 23. I spent the majority of my bio studying time using the Kaplan book and only 5-10% of my time going over the TopScore or Barron's questions (which I thought only reiterated everything that was already in Kaplan's except for a question here and there). Bio was my best section with a 24. Honestly, i don't remember any questions about the digestive system on the real thing, but your test could be different. Best to get as many sources you can. But seriously...focus your studies on the that kaplan book.allstardentist said:Is the kaplan white book enough?