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
B
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A hypothesis is a(n) ________
A) tentative answer to a question B) guess C) observation D) theory
A variety of finch species within the Hawaiian Islands have acquired different types of beaks needed for utilizing specific food resources. The process by which these different species of finches came about is likely to have involved
A. natural selection. B. evolution. C. an accumulation of harmful genetic mutations. D. both natural selection and evolution. E. None of these choices are correct.
In heterotrimeric G proteins, the ________ subunit stimulates adenylyl kinase.
Fill in the blank(s) with the appropriate word(s).
The epilimnion of a lake is located below the hypolimnion.
Answer the following statement true (T) or false (F)