Biosynthesis of vitamin K (menaquinone) by ________ spp. inhabiting the ________ of humans is a potentially important mutualistic relationship for human health.
A. Bifidobacterium / intestinal tract
B. Bifidobacterium / stomach
C. Escherichia / intestinal tract
D. Escherichia / stomach
Answer:C
Biosynthesis of vitamin K (menaquinone) by ________ spp. inhabiting the ________ of humans is a potentially important mutualistic relationship for human health.
A. Bifidobacterium / intestinal tract B. Bifidobacterium / stomach C. Escherichia / intestinal tract D. Escherichia / stomach