Figure 38-1 Based on the Data in the Accompanying

Multiple Choice

Figure 38-1 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.