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There are many different types of viruses and bacteria that can live and reproduce inside humans and often make us sick. In which of the following ways are

viruses different from bacteria?

a. Viral infections always cause a fever while bacterial infections almost never do
b. Viruses must invade a host cell to reproduce while bacteria can reproduce on their own
c. virus cells, in general, are at least three times as large as the largest bacterial cell
d. Viral infections are more likely to disable or kill their host that bacterial infections


Letter b. viruses need a host to reproduce :)
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the answer is letter b. because virus cannot reproduce on own it needs the hosts biosynthetic mechanism to produce another virus particle. another difference is that a virus is not alive outside the body of a host that is why viruses are not considered as an organism but just a particle they are crystallized outside a host 
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