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Author Question: In a sequence of sedimentary rocks, you find a layer of poorly sorted sedimentary rock that includes ... (Read 75 times) |
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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.