A Microbiologist Inoculates Staphylococcus Epidermidis and Escherichia Coli into a Culture

question 70

Multiple Choice

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

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Definitions:

Experimental Method

A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.

Independent Variable

The variable in an experiment that is manipulated to observe its effect on a dependent variable.

Positive Correlation Coefficient

A statistical measure indicating that as one variable increases, the other variable tends to increase as well.

Covary

Refers to the phenomenon where two variables change in relation to each other, often used in statistical analysis to understand correlations.