The normal flora that inhabit our body surfaces ____.
A) are harmful
B) competitively exclude more harmful species
C) produce vitamin C
D) become even more beneficial if they invade tissues
E) participate in phagocytosis of pathogens

Question

The normal flora that inhabit our body surfaces ____.​
A) ​are harmful
B) ​competitively exclude more harmful species
C) ​produce vitamin C
D) ​become even more beneficial if they invade tissues
E) ​participate in phagocytosis of pathogens

Quizplus · Accepted Answer

Normal flora competitively exclude more harmful species by occupying niches that pathogens might occupy, producing substances harmful to pathogens, and affecting conditions such as pH and oxygen levels in ways that inhibit the growth of non-native species.

The Normal Flora That Inhabit Our Body Surfaces ____