AP Biology Material

<p>Hey, I plan on taking the ap biology exam in a few months. For those of you who have taken this test, can you please tell me which material i should focus on the most. Cellular respiration? Biodiversity? Genetics? etc. Also, my ap bio teacher gave us a take home unit in which had 5 days to learn 8 chapters on biodiversity (kingdoms). It was impossible to digest so much info. in so little time. I plan on reviewing this material, but should i just use a prep book to learn or actually go back and read the textbook? If the biodiversity stuff just needs memorization, i rather just use a prep book like Cliff's.
Thanks for the all help!</p>