<p>Hey guys...are the Chapters on "Cell Communication" and the portion of "Phylogeny and Systematics" (dealing with cladograms, Cenozoic, palezoic eras...etccc) totally unnessary and insignificant for the AP Biology exam?</p>
<p>Also, what other chapters/portions from the book do you think are not worth the time to really spend so much time on..</p>
<p>By the way, I am using Cliffsnotes Biology- best prep book for the exam :)</p>
<p>Thanks.</p>