A microbiologist inoculates Staphylococcus epidermidis and Escherichia coli into a culture medium.Following incubation, only the E.coli grows in the culture.What is the most likely explanation?
A)The microbiologist used too much inoculum.
B)The culture is contaminated.
C)The incubation temperature was incorrect.
D)The culture medium must be selective.
E)The culture medium must be differential

Question

Quizplus · Accepted Answer

The culture medium must be selective, which means it allows the growth of certain types of organisms while inhibiting the growth of others. In this case, the medium was selective for E. coli and inhibited the growth of Staphylococcus epidermidis.

A Microbiologist Inoculates Staphylococcus Epidermidis and Escherichia Coli into a Culture