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Author Question: Until the Columbian Exchange, humans did not noticeably alter the natural environment. Indicate ... (Read 84 times) |
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.