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Author Question: The visible surfaces of the tooth are covered with ____________________. Fill in the blank(s) with ... (Read 104 times) |
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.