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Barron's AP Biology: With Two Practice Tests is revised to reflect all upcoming changes to the AP Biology course and the May 2020 exam. You'll get the in-depth content review and practice tests you need to fully prepare for the exam. This edition features: Two full-length practice exams in the book that follow the content and style of the revised AP Biology exam with detailed answer explanations for all questionsA fully revised introduction that covers the new exam format, including the exam sections, the question types, the number of questions per section, and the amount of time allotted per sectionHelpful test-taking tips and strategies throughout the book, plus icons that designate sections with particularly helpful background information to know19 comprehensive review chapters that cover all of the major topic areas that will be tested on the exam (including the Cell Cycle, Photosynthesis, Heredity, and much more) End-of-chapter practice questions that reinforce the concepts reviewed in each chapterAppendices (with key measurements that you should be familiar with) as well as a glossary of key terms and definitions.