A Plant Secretes ____ When It Needs to Respond Defensively

Question

A plant secretes ____ when it needs to respond defensively to a pathogen.  
A) salicylic acid
B) systemin
C) brassinosteroids
D) mineralocorticoids
E) nitric oxide

Accepted Answer

Salicylic acid is a signaling molecule that is produced by plants in response to a pathogen attack. It triggers the plant's immune response, helping the plant to defend itself against further damage.