Bio1100 Chapter 15 Chap 13   Evolution and diversity among the microbes   Chap 16
  1. Microbes are tiny organisms that include viruses   .









     
  2. Viruses are intracellular parasites   and can reproduce only within host   cells.



     
  3. The human immunodeficiency virus (HIV) is a retrovirus   that infects human white   blood cells.



     
  4. The influenza virus is another RNA   virus noted for its mutability.