Viruses are considered as borderlines between the living and non-living. give reason .

i need it for exam

Viruses are non-living when they are outside the host cell as they don't have any cellular machinery of their own. But when they are present inside the body of a host, they are living. They take over the host cell machinery to replicate themselves, killing the host. That's why they are considered as borderline between living and non-living.

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because they lack cellular structure(a non living feature) but can reproduce in an host organism(living feature).

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