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Author Question: How does punctuated equilibrium differ from the Darwin model of gradual change over time? What ... (Read 62 times) |
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.
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Vaccines prevent between 2.5 and 4 million deaths every year.