Final answer:
Viruses are obligate intracellular parasites that rely on host cells for replication.
Explanation:
Viruses are obligate intracellular parasites that require a host cell to replicate. They cannot reproduce on their own and must invade a host cell to carry out their replication process. This characteristic distinguishes them from other types of pathogens.
Learn more about Virus Reproductive Characteristics here:
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