CK-12 Foundation
Ck 12: Prokaryotic and Eukaryotic Cells
[Free Registration/Login may be required to access all resource tools.] Watch videos, read grade-level texts, complete activities, and take assessments about prokaryotic and eukaryotic cells.
University of Arizona
The Biology Project: Prokaryotes
A brief overview of the prokaryotes. The resource contains some interesting facts that will help you understand the great contrast that exists in the prokaryotic way of life.
Texas Education Agency
Texas Gateway: Cell Comparisons
Understand the difference between eukaryotes and prokaryotes in this interactive tutorial.
Sophia Learning
Sophia: Cells: The Structural and Functional Units of Life: Lesson 3
This lesson will illustrate the structure and function of the cell. It is 3 of 4 in the series titled "Cells: The Structural and Functional Units of Life."
Other
The Domains and Kingdoms of Life
This site is a description of the history behind the 5 Kingdom system suggested by Robert Whittaker. An extensive list of resources is included.