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Biology: Concepts and Investigations 2nd Edition by Mariëlle Hoefnagels
Edition 2ISBN: 978-0077295349Biology: Concepts and Investigations 2nd Edition by Mariëlle Hoefnagels
Edition 2ISBN: 978-0077295349 Exercise 9
No one knows how or when viruses originated. Some scientists suggest that viruses were once pieces of cellular DNA that eventually became independent. Why is this hypothesis hard to test?
Explanation
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There would be nothing left behind in th...
Biology: Concepts and Investigations 2nd Edition by Mariëlle Hoefnagels
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