Hey, I've been doing the aamc practice items and other practic questions and have come across some questions that I got wrong, but I don't know why. It's so frustrating!!! They don't have an explanation for the answers and I still didn't understand after rereading and trying to look stuff up in texts. I'm wondering if anyone here who has done/is doing these and other practice tests would be interested in using each other for questions/explanations? My question for now: In the AAMC biological sciences practice items question number 134!!! I think my problem is I don't understand the question. It would be a little involved to write out the question as it is based on a passage. Please help!!!