American Institute of Biological Sciences
Action Bioscience: Bacteria: More Than Pathogens
An explanation of the differences between bacteria and viruses. Further details are given showing that not all bacteria are bad.
University of California
Ucmp: Introduction to Bacteria
This site provides an introduction to bacteria and examines fossil records, life history and ecology, systematics, and morphology.
BiologyWise
Biology Wise: Gram Negative Bacteria
Learn about gram staining and the characteristics of gram-negative bacteria. A discussion of cell wall structure is accompanied by a labeled illustration. Includes a list of examples of gram-negative bacteria organized by subgroup....
BiologyWise
Biology Wise: Different Types of Bacteria
Discusses the different criteria used to classify bacteria and the groups of bacteria within each category. Groups are organized by characteristics such as morphology, shape, cell wall structure, and presence of flagella.
BiologyWise
Biology Wise: Eubacteria Examples
Presents examples of eubacteria along with descriptions.
BiologyWise
Biology Wise: Helpful and Harmful Types of Bacteria
Some types of both beneficial and harmful bacteria are identified and described. States characteristics, where each is found, and their benefits or the diseases that they cause.
BiologyWise
Biology Wise: Aerobic Bacteria
Types of aerobic bacteria and examples of each are described.
BiologyWise
Biology Wise: Bacteria That Are Commonly Present All Around Us
Examples of helpful and harmful bacteria are described in this resource.