-The effect of directional growth shown in the accompanying figure is known to be caused by ____.
A) thigmotropism
B) gravitropism
C) abscisic acid
D) salicylic acid
E) vernalization

Question

-The effect of directional growth shown in the accompanying figure is known to be caused by ____.
A) ​thigmotropism 
B) ​gravitropism 
C) ​abscisic acid 
D) ​salicylic acid 
E) ​vernalization

Quizplus · Accepted Answer

Gravitropism is the directional growth of a plant in response to gravity, causing roots to grow downward and shoots to grow upward.

-The Effect of Directional Growth Shown in the Accompanying Figure