Kaplan is what I used to study for the OAT, flashcards and everything......
some sections in the book go into WAAAY more detail than you need, like photosynthesis; there was only 1 question on the OAT about that (and the answer was NADPA🙂 i know that for a fact!)
anyway, also other useless sections in there is like: animal behavior and classification systems and evolution...all that is silly- skip those parts and you'll be ok.
weird why the OAT wants us to know about "evolution" and "plants"....
😕 but jump through the hoops they give you, and you'll be ok.