The Bacterium,E

Multiple Choice

The bacterium,E.coli,lives in the large intestines of mammals and feeds on undigested food material.E.coli helps to synthesize vitamin K that is essential for mammalian blood clotting.The relationship between E.coli and mammals is a

A) commensalism.
B) mutualism.
C) competition.
D) predation.
E) parasitism.