Bacteria live in a variety of locations one of which is the human mouth. Which explanation supports the wide variety of bacteria in the mouth? A.Accessibility to nutrients makes the mouth a favorable habitat. B.Calcium in the teeth provides appropriate pH levels in the mouth. C.Accessibility to air cause bacteria to change form. D.Salivary glands cause mutations in populations of bacteria. thank you
Biology - 2 Answers
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1 :
The answer is A. When we eat sugary foods, the sucrose can be converted to useful products for the bacteria via glycosylation. B. Calcium does not influence pH. C. Bactera randomly mutate. Being exposed to air has no effect on them (think of obligate aerobes, obligate anaerobes, and facultative aerobes). D. Saliva contains lysozyme, an enzyme that breaks open bacterial cell membranes.
2 :
A. Accessibility to nutrients makes the mouth a favorable habitat.
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