Answer the following question given this paragraph: 

Though viruses are not considered living, they share two important traits with living organisms. They have genetic material like all cells do (though they are not made of cells), and they can evolve. The genetic material of a virus can change (mutate), altering the traits of the virus. As the process of evolution has resulted in all life on the planet today, the classification of viruses has been controversial. It calls into question the very definition of life.


Q: Though viruses are not considered living, they share two important traits with living organisms: they have genetic material and they can undergo what process?


A:
evolution