Final answer:
The correct usage of binomial nomenclature in the presented options is c) Staphylococcus aureus and d) Bacillus subtilis, as they both correctly include the genus and species names in the proper format.
Correct option is d) Bacillus subtilis
Step-by-step explanation:
The correct usage of binomial nomenclature is to include both the genus name and the species name, with the genus name capitalized and the species name in lowercase, both italicized or underlined when handwritten. In the options presented, Staphylococcus aureus and Bacillus subtilis are the only two that correctly follow this format.
The genus Staphylococcus is well-studied and includes species like S. epidermidis and S. aureus. These organisms are facultative anaerobic, halophilic, and nonmotile, with S. aureus often associated with nosocomial infections and easily distinguishable on a mannitol salt agar plate.
Therefore, the correct usage of binomial nomenclature from the options provided is c) Staphylococcus aureus and d) Bacillus subtilis.