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.
mrsa infections occur in humans (homo sapiens). humans are in which kingdom?
eukarya
archaea
bacteria
animalia
protista

Explanation:

Humans (Homo sapiens) are multicellular, heterotrophic organisms with specialized tissues, which falls under the Animalia kingdom. Eukarya is a domain, not a kingdom; Archaea and Bacteria are domains of single-celled prokaryotes; Protista consists of mostly single-celled eukaryotes, none of which describe humans.

Answer:

D. Animalia