Ck 12: Life Science: Structural Evidence for Evolution

[Free Registration/Login may be required to access all resource tools.] Even though two different species may not look similar, they may have similar internal structures that suggest they have a common ancestor. That means both evolved from the same ancestor organism a long time ago. Common ancestry can also be determined by looking at the structure of the organism as it first develops. Learn more about structural evidence for evolution in this learning module produced by CK-12.