CK-12 Foundation
Ck 12: Life Science: Domains of Life
[Free Registration/Login may be required to access all resource tools.] Humans are in the same domain as trees and algae. What could they possibly have in common? It is the location of their DNA inside their cells. Their cells all have a...
CK-12 Foundation
Ck 12: Biology: Prokaryote Evolution
[Free Registration/Login may be required to access all resource tools.] An overview of the evolution of prokaryotes.
BiologyWise
Biology Wise: Three Domains of Life
Describes the characteristics of Archaea, Bacteria, and Eukarya, the three domains of life.