Systemic acquired resistance begins when an infected tissue releases small molecules that travel to other parts of the plant, where they trigger cells to produce a plant hormone called ____.
A)hydrogen peroxide
B)nitric oxide
C)salicylic acid
D)progesterone
E)cytokinin

Question

Quizplus · Accepted Answer

Systemic acquired resistance is triggered when infected tissue releases small molecules, such as salicylic acid, that signal other parts of the plant to produce defensive compounds. Salicylic acid acts as a plant hormone and induces the expression of genes involved in the plant's defense response.

Systemic Acquired Resistance Begins When an Infected Tissue Releases Small