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Barrons AP Biology is one of the most popular test preparation guides around and a must-have manual for success on the Biology AP Test. In this updated book, test takers will find:Two full-length exams that follow the content and style of the new AP examAll test questions answered and explainedAn extensive review covering all AP test topicsHundreds of additional multiple-choice and free-response practice questions with answer explanationsBONUS ONLINE PRACTICE TEST: Students who purchase this book will also get FREE access to one additional full-length online AP Biology test with all questions answered and explained.