In comparing the number of differences in amino acids for cytochrome c: between a moth and a rattlesnake there are 31 different amino acids in the sequence, between a moth and a dog there are only 25, and there are 6 differences between a dog and a horse. Therefore, ( ) this is sufficient evidence to prove the moth is closer related to the dog than to the horse. ( ) dogs had to evolve earlier than horses, since moths are more primitive. ( ) evolution used to be considered a unifying theory until biochemical data showed only differences. ( ) added to anatomical similarities and fossil records, this provides additional evidence for constructing a phylogeny or family tree. ( ) biochemical information is not relevant to the evolution of organisms.