Ck 12: Life Science: Timeline of Evolution

[Free Registration/Login may be required to access all resource tools.] For life to evolve from simple single-celled organisms to many millions of species of prokaryotic species to simple eukaryotic species to all the protists, fungi, plants, and animals, took some time. Well over 3 billion years. Learn more about the timeline of evolution in this learning module produced by CK-12.