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Biology archive | Science | Khan Academy

The biology archive contains legacy biology content, and is not being updated with new content. Exercises and mastery mechanics will soon be removed from the biology archive. For our most up-to-date, mastery-enabled courses, check out High School Biology and AP Biology!

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The biology archive contains legacy biology content, and is not being updated with new content. Exercises and mastery mechanics will soon be removed from the biology archive. For our most up-to-date, mastery-enabled courses, check out High School Biology and AP Biology!

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