The "common cold" is so common because

A) no immunity to the virus develops.
B) the highly variable parainfluenza virus causes colds.
C) a large number of coronaviruses cause it.
D) over 100 strains of rhinovirus cause colds.
E) 100+ strains of rhinovirus and several other types of virus cause "colds."


E

Biology & Microbiology

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Given what you now know, what information is most likely to produce the correct answer?

What will be an ideal response?

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What part of the DNA molecule is most exposed to the watery environment in the cell?

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