How do viruses respond to the environment?

Question

how do viruses respond to the environment?

& also How does the viruses metabolism work?

[please answer asap]

Answer 1

Umm..not entirely sure....on the environment part.  

Viruses aren't alive though.   They are just dna or RNA in a protein casing and they do nothing on their own.    

When they enter your body, they inject their dna/rna into a host cell and hijack the cell.   They use the hosts enzymes to replicate....until they replicated enough to cause the host cell to burst open.....and they spread like that.  

So their metabolism is the host cells metabolism.  

The only environmental response i can think of is mutation.   Since they replicate relatively fast.....mutations take place at a relatively fast rate......so lets say a virus is suppose to die at/above 100 F.   Get a chance 1 can survive, through mutation, at 101 F.....so the body forces you to get a fever of 100 F and the one that can live above that solely replicates and spreads.