Question 9 Escherichia coli benefits its host in several ways. It produces vitamin K and B 12 , both of which mammalian hosts require. On the other hand, E. coli is best suited to live in large relationship between the human host and bacterium would be best termed
a(n):
◻holistic relationship.
◻antagonistic relationship.
◻saprophytic relationship.
◻parasitic relationship.
◻symbiotic relationship.