Viruses and Prokaryotes

Practical examples show how viruses and bacteria are both beneficial and harmful to humans. Animations describe the structure of a virus, and explain how they reproduce and cause disease. Microscopic images illustrate different types and shapes of bacteria. The application of bacteria in our lives today is discussed. Other terminology includes: hosts, parasite, vaccine, fission, mutualism, cyanobacteria, saprophyte, pathogen, and antibiotics.