Why are dna and protein similarities used as evidence of evolution?

What are the types of mutations, and how does each alter the encoded protein? college level answer

Dna, in the nucleus carries the genetic code for making proteins in ribosomes. in the diagram, b, represents the proteins produced. dna cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. how does the genetic code get from the nucleus to the ribosome? what does a represent? now

Why were the results whit just water so much different than the trials with the detergent ?