Final answer:
A virus is not a living organism as it lacks key characteristics of life.
Step-by-step explanation:
A virus is not considered a living organism because it lacks key characteristics of life. Although a virus has DNA or RNA, it does not have the ability to replicate on its own and lacks cellular structure. Viruses are considered obligate intracellular parasites, meaning they require a host cell to replicate. They infect cells and use the cellular machinery of the host to reproduce.
Learn more about Viruses as living organisms