Bush beans grow as small bushes rather than as vines because their internodes are short and they branch close to the apical meristem. Which of the following substances, if applied to a bush bean, might cause it to grow as a vine?
A)a cytokinin
B)a gibberellin
C)abscisic acid
D)ethylene

Question

Quizplus · Accepted Answer

Gibberellins are plant hormones that can stimulate stem elongation by promoting cell division and elongation. If applied to a bush bean, gibberellins can cause the internodes to elongate and the plant to grow as a vine.

Bush Beans Grow as Small Bushes Rather Than as Vines