Microbiology: A Systems Approach 4th Edition by Marjorie Kelly Cowan

Exercise 37

Critical thinking is the ability to reason and solve problems using facts and concepts. These questions can be approached from a number of angles and, in most cases, they do not have a single correct answer.
Define each of the following terms and describe where in or on the body you may find such microbes:
obligate aerobes
facultative anaerobes
anaerobes
aerotolerant anaerobes