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
B
You might also like to view...
Unlike other prokaryotes, archaeons (except Sulfolobus) have two origins of replication.
Answer the following statement true (T) or false (F)
The simplest technique for isolating bacteria in growth media is referred to as the
A. pour-plate method. B. streak-plate method. C. serial dilution method. D. MPN method.
Glucose monomers linked into a highly branched chain make up ____
a. glycogen b. cellulose
c. fructose d. starch e. sucrose
The reticuloendothelial system
A. is a support network of connective tissue fibers. B. originates in the cellular basal lamina. C. is heavily populated with macrophages. D. provides a passageway within and between tissues and organs. E. All of these choices are correct.