Many of the proteins produced by humans have identical or nearly identical counterparts in chimpanzees. For example, the hemoglobin in your blood is about 99% similar to chimp hemoglobin. This suggests that humans and chimps share a common ancestor, from which both species evolved via ____________.
While humans and chimps remain very similar in some ways, the differences that exist between them have arisen over time due to different adaptations to differing conditions.(copied from USATESTPREP)
