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DiscoverBiology.com gives you free and open access to interactive learning and review material. Study with Quiz+ diagnostic quizzes that go beyond just telling you what you got right and wring. Quiz results show you what you still need to review through an interactive, customized study plan. Get organized with a complete study plan for each chapter. Master new terms with flashcards and an audio glossary. See how biology is relevant to your life through six applied chapters on topics such as smoking and sustainability.