Branches on the Tree of Life: Viruses & Bacteria DVD

This DVD program describes the discovery of viruses and their structure, how viruses are studied, how they infect their hosts, and how they replicate. Details are provided on the T4 bacteriophage and retroviruses such as HIV. The bacteria section uses compelling microscopy of living bacteria to examine their structure, physiology, behavior, and the vital roles these microbes play in the biosphere, including oxygen production (cyanobacteria), decomposition, nitrogen fixation, and as parasites and helpful symbionts. DVD includes an illustrated PDF teaching guide. Close-captioned. 45 minutes. 2004.