How can mutations affect the traits of an organism?

Mutation is another for of adaptation and if an organism adapts that mans it is stronger and will most likely live linger  

Mutations are a random change in the DNA sequence. DNA codes for proteins that are expressed in the body. When a mutation is present, the DNA will code for different proteins. This causes different traits to be expressed in an organism.

Ireally dont know sorry

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.