Studies of a soybean plant (Glycine max) and the bacterium Bradyrhizobium japonicum have shown that after the

bacterium enters the root, cells of the root cortex begin to divide in response to ____.



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
e. a flavonoid produced by the bacterium


ANSWER: c

Biology & Microbiology

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