In what way are Archaea and Bacteria similar? How are the different? What does the term pathogenic mean? Most microorganisms are not pathogenic. What role do microorganisms play in the environment and in helping maintain human health? What do Semmelweis and Lister have in common? Why was Lister successful in getting the medical community to accept his ideas while Semmelweis died in an mental hospital mainly due to the widespread rejection of his, very similar, ideas? What is meant by the term spontaneous generation? Explain the experiments conducted by Redi and Pasteur that led to the disproving of this idea. Though microorganisms were discovered in the 1600's, it would be two centuries before the germ theory would emerge. Explain why it took this long to identify microorganisms as the cause of disease. Deseribe the steps involved in Koch's postulates. What does the application of Koch's postulates determine? List the steps of the scientific method in order. What is a theory and how does it differ from a hypothesis? Describe the steps involved in Koch's postulates. What does the application of Koch's postulates determine? Link each step in Koch's postulates to the steps of the scientific method. List and explain three ways that the adoption of the germ theory led to the advancement of treatment and prevention of disease. Explain why the acceptance of germ theory and the application of Koch's postulates aided in the development of vaccines. .