1) Describe how comparing the anatomy of living species provides evidence of evolution.
A: Comparisons of the anatomy of different types of organisms often reveal basic similarities in body structures even though the structure's functions may differ between organisms. For example, sometimes bones are present in an organism but are deducted in size and either have no use of have a less important function that they do in other, related organisms. Such structures, which are considered to be evidence of an organism's evolutionary past, are called vestigial structures.
2) State how comparing the amino acid sequence of a protein can provide evident that evolution has taken place.
A: If evolution has taken place, then, in general, species descended from a recent common ancestor should have fewer amino acid differences between their proteins than do species that share a common ancestor in the more distant past.