What is an example of cross-contamination?
A. Cutting raw vegetables with a clean chef’s knife
B. Placing raw meats on the same shelf of the refrigerator
C. Preparing raw chicken and vegetables on the same cutting board
D. Using clean hands and work surfaces when preparing food
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What are the advantages of using serial dilution?
A. allows for precise measurement of concentration of a sample
B. allows isolation of pure cultures of microorganisms from mixed populations
C. allows for preparation of solutions with a known concentration
D. All of the above
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