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Bacteria

Khan Academy 1,165,437 lượt xem 15 years ago
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/biology/bacteria-archaea/prokaryote-structure/v/bacteria

Introduction to bacteria
More free lessons at: http://www.khanacademy.org/video?v=TDoGrbpJJ14

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