Species Identification

bone structure of various animal limbs

In this topic, you learned how important it is for scientists to take a look beneath the surface of an organism to understand the evolutionary relationship it has with other organisms. You learned how differences in DNA and RNA, which are sometimes manifested in amino acid sequences, can be observed and used to create a molecular clock in determining how much time a species diverged from other species. You also learned how many species share common features that all tie into embryonic development.