Many viruses released into the air survive for only short periods of time. Which of the following is the most likely reason for this? A. Viruses attract antibodies in the atmosphere. B. Viruses require a low atmospheric pressure. C. Viruses are hosts for bacteria that eventually destroy them. D. Viruses are dependent on host cells of living organisms.
A virus doesn't do real metabolism, but uses the host cell. The correct answer is D.