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Author Question: Derrick is conducting a stratified sampling procedure. His target sample is 250 from a population of ... (Read 49 times) |
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Excessive alcohol use costs the country approximately $235 billion every year.