Viruses mutate and can become more pathogenic to humans. some viruses may originate in other animals, such as birds, bats or pigs and then become infectious to humans. an influenza pandemic is a global outbreak of disease that occurs when a new influenza a virus appears or "emerges" in the human population, causes serious illness, and then spreads easily from person to person worldwide. such a
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Biology, 22.06.2019 06:30
Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m
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Biology, 23.06.2019 04:00
Awarm front often brings a. cirrus clouds b. fair conditions c. cool weather d. steady rain
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Viruses mutate and can become more pathogenic to humans. some viruses may originate in other animals...
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