The fundamental characteristic of viruses is that they can reproduce only within the cells of a living organism.
(The fundamental characteristic of viruses; is; that they can reproduce only within the cells of a living organism) Context(The fundamental characteristic of viruses is,List([0, 44))):(they; can reproduce; L:only within the cells of a living organism)
The fundamental characteristic of viruses is,List([0, 44))
The fundamental characteristic of viruses they
is can reproduce
that they can reproduce only within the cells of a living organism
L:only within the cells of a living organism