________ microbiologists monitor community food establishments and water supplies in order to control the spread of communicable diseases.
Fill in the blank(s) with the appropriate word(s).
Public health
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In the movie "Contagion", one person who has become infected with a recombinant pathogenic virus spreads it to a large number of people with whom she comes into contact. Those people then spread it to others, and, before you know it, the disease has spread all over the world. This is an example of a ________ epidemic.
A. common-source B. endemic C. point-source D. propagated
Annelids have _______, which are hair-like extensions anchored in their skin.
a. chaetae b. parapodia c. radula d. nephridia
The maximum possible rate of increase is a species’
__________ potential. Fill in the blank(s) with the appropriate word(s).
Which of the following is the best definition of "microbial antagonism"?
A. the presence of pathogens on the surface of the skin, which will invade the body through abrasions B. the presence of normal microbiota that protect the body by competing with pathogens in a variety of ways to prevent pathogens from invading the body C. the presence of normal microbiota that can become pathogens under certain conditions D. the ability of microbiota to mutate into pathogens E. the presence of resident bacteria on the surface of the body and in cavities that connect to the surface