1. Lesson 10: Bacteria and Viruses Bacteria: the simplest, single-celled living organism in our world. They have no organized nucleus and exist only to reproduce. Virus: A microorganism that is smaller than a bacterium that cannot grow or reproduce apart from a living cell. It has no nucleus.

2. Watch this fast talking virus and bacteria explain themselves! Have your pencils and study guide ready! You’ll need to watch it more than once to get all the information. Viruses and Bacteria

3. Illustrate these bacteria in your cell science journal. There are 3 basic types of bacteria

4. Illustrate this bacteria in your journal.

5. Illustrate this virus in your cell science journal

6. Watch this 3D medical animation of a virus infecting a a poor, unsuspecting human. Make a flow map of the events in your cell science journal. How a virus makes us sick. How a virus makes us sick

7. What do you think? Some scientists argue that viruses are not living organisms. Use information from this slide show to support your opinion.