Question

The human mouth has a plethora of bacteria species. Why is there so much variety of bacteria in the mouth?

A.
Lots of air cause the bacteria to mutate.
B.
Saliva causes bacteria to mutate.
C.
Nutrients in the mouth create a favorable habitat.
D.
Calcium in the teeth provides the proper pH.

Answer 1

The correct answer is A. Other bacteria actually protect our teeth and gums. There are some bacteria, however, that we'd rather do without, since they cause tooth decay and gum disease. Streptococcus mutans is the bacteria you've probably heard the most about. It lives in your mouth and feeds on the sugars and starches that you eat.

Answer 2

the correct answer is choice A because when you breath in, bacteria enters your mouth and it allows them to reproduce. also since your mouth is dark and damp, it is a good source of nutrition.