McGraw Hill
Glencoe Biology: Bacteria and Viruses: Chapter Test Practice
Ten multiple-choice test practice questions covering bacteria and viruses. Students have the opportunity to check their answers after submitting their results.
BiologyWise
Biology Wise: Bacteria vs. Virus
Discusses what bacteria and viruses are and the differences between them.
CK-12 Foundation
Ck 12: Life Science: Viruses
[Free Registration/Login may be required to access all resource tools.] We have all heard of viruses. The flu, the common cold, and many other diseases are caused by viruses. But what is a virus? Do you think viruses are living? Which...
CK-12 Foundation
Ck 12: Life Science: Scientific Theories
[Free Registration/Login may be required to access all resource tools.] Today most people realize that microorganisms, such as bacteria or viruses, are the cause of disease. This concept is known as the germ theory of disease, one of the...
Tree of Life Project
The Tree of Life Web Project
The Tree of Life is a multi-authored, Internet distributed project containing information about phylogeny and biodiversity. The Tree of Life can be used to locate information about a particular group of organisms through their taxonomy.
Soft Schools
Soft Schools: Microscopic World Quiz
Take this interactive, multiple-choice quiz over microorganisms, then review your score and any missed questions at the end.
CK-12 Foundation
Ck 12: Barriers to Pathogens
[Free Registration/Login may be required to access all resource tools.] In the following tutorial you will learn about the barriers that keep most pathogens out of the human body.