1) which of the following is not true about normal microbiota?
a) they begin to be established at birth.
b) physical and chemical factors affect their growth.
c) they are localized in specific body regions.
d) they are present only for a relatively short time.

D

Explanation:

Normal microbiota are beneficial micro flora that are found in all humans an animals. These normal microbiota consists of various bacteria, fungi, and archaea that are found in specific regions of the body which includes the skin, gut, saliva, oral mucosa, conjunctiva, and in the GIT. They play an important role in body immunity.

Microbiota community develop from the prenatal, and are established from birth. Physical and Chemical factors such as pH level, temperaturea, oxygen etc affect the growth of these miocrobiota.

Answer is D because Microbiota are present all through life.

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