<p>Hey all you Gauchos who have taken MCDB 1A, I was thinking about buying a 9th edition "Life: The Science of Biology" textbook which is required for the class. However, the current version is 10th edition and I e-mailed the professors and 1 of them advised against using older editions and 1 said that I can use an older edition except that it will have some outdated info and not include some new info. Therefore, for those of you who have taken MCDB 1A, I ask you, do I really need the 10th edition or can I do great in class by just getting the 9th edition? Also, will there by any access code for homework or anything in the same way that in the Physics 6 series you have to buy an access code for MasteringPhysics, or like ALEKS for the Chemistry classes?</p>