Question

you expose the bacterium staphylococcus aureus to low levels of the antibiotic methicillin. the surviving bacteria are then exposed to higher concentrations of methicillin and the process repeated until a strain of methicillin - resistant s. aureus (mrsa) is remaining. to test your hypothesis, you perform an experiment by spreading the original strain of s. aureus and the mrsa strain onto agar plates containing methicillin, and only the mrsa survives. in conducting this experiment, you are working with the bacterium s. aureus, which belongs to which domain? options: eukarya, archaea, prokarya, protista, bacteria

Explanation:

All bacteria, including Staphylococcus aureus, are classified under the domain Bacteria. Prokarya is not an official taxonomic domain; the three recognized domains are Bacteria, Archaea, and Eukarya. Eukarya includes organisms with membrane-bound nuclei, Archaea are distinct prokaryotes often in extreme environments, and Protista are eukaryotic organisms, none of which apply to S. aureus.

Answer:

Bacteria