Final answer:
Staphylococci, especially Staphylococcus epidermidis and Staphylococcus aureus, are the common bacteria found on the skin, hair, and nose, thereby making option a) Staphylococci the most accurate answer.
Step-by-step explanation:
The types of bacteria that can be commonly found as flora of the skin, hair, and nose include a variety of species, primarily comprising Staphylococcus spp. The species Staphylococcus epidermidis and Staphylococcus aureus are prevalent in the normal microbiota of these regions. Especially, S. epidermidis is a common microorganism living on healthy human skin, and S. aureus is frequently found in the nasal passages. When asked about the kind of bacteria found on the skin, hair, and nose, the most accurate option would be a) Staphylococci.
It's important to note that while Staphylococcus aureus is a common colonizer of these areas, it can also cause a range of infections if it penetrates beyond the skin's surface, through cuts or other wounds. This bacterium is also associated with nosocomial infections, particularly those transmitted via medical devices inserted into the body.
Furthermore, the genus Staphylococcus falls under the class Bacilli, reflecting a classification based on certain genetic and biosynthetic criteria rather than just their cocci (spherical) shape, which sometimes confuses people because Bacilli typically refers to rod-shaped bacteria.