​It Is Thought That Viruses May Have Originated from Cells

question 15

Multiple Choice

​It is thought that viruses may have originated from cells because ____.

• A) ​of their small size
• B) ​they are pathogens
• C) ​they can only replicate within a host cell
• D) ​they do not have organelles
• E) ​of their genetic material

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