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Author Question: An enzyme with high activity in an acidic environment is A) amylase. B) pepsin. (Read 774 times) |
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.