Based on the data in the accompanying figure, the condition that results in root development is:

a. a high ratio of auxin to cytokinin.
b. a low ratio of auxin to cytokinin.
c. a relatively equal proportion of auxin to cytokinin.
d. cytokinin levels of at least 0.2 mg/L.
e. auxin concentrations of 0.5 mg/L.


a

Biology & Microbiology

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