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Author Question: Radioactive materials can sometimes be used to determine the ________. A) origin of rocks B) ... (Read 74 times) |
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The FDA recognizes 118 routes of administration.
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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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The average office desk has 400 times more bacteria on it than a toilet.