Studies of a Soybean Plant (Glycine Max) and the Bacterium

Multiple Choice

Studies of a soybean plant (Glycine max) and the bacterium Bradyrhizobium japonicum have shown that the tip of a root hair curls toward the bacteria as a response to which of the following?

A) a flavonoid released by soybean roots
B) nod gene products produced by soybean roots
C) nod gene products produced by the bacterium
D) nitrogen fixation by the bacterium