I’m working on a health & medical exercise and need an explanation and answer to help me learn.

Discussion 2.1: Bacteria and archaea

Define Bacteria and archaea.

These two terms used to be classified together. 

• Discuss what discoveries lead to the separation of these two groups. 
• Identify the technique(s) were used to reclassify these organisms. 
• Discuss whether or not archaea has a role in human health and disease .