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What is infectious disease
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The negative impacts of nonnative species generally outweigh the positive impacts
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What substance acts to prevent sudden ph changes in bodily fluids?
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When it is summer at the south pole, a. the northern hemisphere is tilted toward the sun. b. the southern hemisphere is tilted away from the sun. c. the northern hemisphere is tilted away from the sun. d. both the southern and northern hemispheres are tilted toward the sun.
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What is infectious disease...