Viruses. Viruses are microscopic (organisms?) which exhibit some characteristics of living things, but not all. Viruses range in size from .01 micrometers to .5 micrometers Viruses can’t reproduce on their own, but need a “host” cell. Viral Structure.
Viruses have different types of protein coats, different shapes, and can have different genetic information (DNA,RNA)
Typical cold virus
Cold : respiratory
Polio : nerve cells
Diseases: cold, influenza, measles, smallpox, AIDS