[Free Registration/Login may be required to access all resource tools.] Students will understand where bacteria live, the different types of prokaryotes, and extremephilic bacteria.

Learn about the scientific hypotheses of the origin of life on Earth. [5:55]

Between 1866 and 1977, a total of four new kingdoms were added to the original plant and animal kingdoms identified by Linnaeus. The new kingdoms include Protista (protists), Fungi, Monera (eubacteria), and Archaea (archaebacteria)....

[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...

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.

A complete learning module on microbial diversity that includes a downloadable textbook chapter, teacher guide, and lesson activities. The chapter can also be viewed online. In addition, there are animations, images, a video, and...

A very nice introduction to this group organized in a concise, easy to follow format.

Scientists look at the evolutionary history of organisms to divide them into kingdoms. For awhile, there has been 5 kingdoms, but many scientist are now using 6 kingdoms.

Learn about different forms of life that coexist with us on Earth. This Berkeley article provides links to brief write-ups on the three domains of living organisms: Eukaryota, Bacteria, and Archaea.

In this hands on site, students will have the opportunity to be amateur microbiologists by performing a number of experiments. Supplies needed can found in the home or at a nearby store.

Learn about the endosymbiotic theory. This theory explains the evolution of cells from a mitochondria and chloroplast working together in a symbiotic relationship to the current cell structure.

Explore the three domains of life.

This slideshow provides an overview of the six kingdoms.

A short overview of the six kingdoms in our scientific classification system: Plants, Animals, Protists, Fungi, Archaebacteria, and Eubacteria. A good explanation of how organisms are placed in their particular kingdom.

A short overview of the six kingdoms in our scientific classification system: Plants, Animals, Protists, Fungi, Archaebacteria, and Eubacteria. A good explanation of how organisms are placed in their particular kingdom.

A short overview of the six kingdoms in our scientific classification system: Plants, Animals, Protists, Fungi, Archaebacteria, and Eubacteria. A good explanation of how organisms are placed in their particular kingdom.

A short overview of the six kingdoms in our scientific classification system: Plants, Animals, Protists, Fungi, Archaebacteria, and Eubacteria. A good explanation of how organisms are placed in their particular kingdom.

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.

Learn how prokaryotes reproduce by binary fission, and find out the use of E. coli bacteria in molecular biology.

Study the mechanisms that generate variation in prokaryote populations. Also learn about transduction, transformation, conjugation, as well as transposable elements.

Learn how prokaryotes get energy and nutrients, and find out the difference among chemotrophs, phototrophs, heterotrophs and autotrophs.

Learn about cooperation and "multicellularity" in prokaryotes including mutualisms, commensalisms, parasitisms. Also find out the role of prokaryotes in the carbon and nitrogen cycles.