-Which statement is supported by this figure?
A) The greater the concentration of auxin, the more promotion of root elongation occurs.
B) Auxin concentrations below 10−8 g/L promote both root and stem elongation.
C) Auxin concentrations around 10−4 g/L promote stem elongation but inhibit root elongation.
D) Auxin concentrations above 0.9 g/L are best for promoting stem elongation.

Question

-Which statement is supported by this figure?
A) The greater the concentration of auxin, the more promotion of root elongation occurs. 
B) Auxin concentrations below 10−8 g/L promote both root and stem elongation. 
C) Auxin concentrations around 10−4 g/L promote stem elongation but inhibit root elongation. 
D) Auxin concentrations above 0.9 g/L are best for promoting stem elongation.

Quizplus · Accepted Answer

Auxin is a plant hormone that has different effects on root and stem elongation at different concentrations. At around 10^-4 g/L, it promotes stem elongation but inhibits root elongation, which is consistent with known effects of auxin on plant growth.

-Which Statement Is Supported by This Figure