Negative-Sense Single-Stranded RNA Viruses Are Thought to Have Arisen Many

question 30

Multiple Choice

Negative-sense single-stranded RNA viruses are thought to have arisen many times independently because

• A) they have only a few genes.
• B) they have diverse capsid morphology.
• C) they cause many human diseases including measles,mumps,and rabies.
• D) their nucleotide sequences suggest that the different viruses are not closely related.
• E) there are no known fossils.

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