Which of the following must occur for a plant to initiate chemical responses to herbivory, before it is directly affected by herbivores?
A) a plant must be old enough to have already flowered at least once
B) volatile "signal" compounds must be perceived from already attacked plants
C) gene-for-gene intraspecific recognition must occur between the plant and the herbivore
D) phytoalexins must be released by the herbivore

Question

Quizplus · Accepted Answer

Plants can initiate chemical responses to herbivory by perceiving volatile organic compounds released by neighboring plants that are under attack. This allows them to "prepare" for potential herbivore threats before being directly affected themselves.

Which of the Following Must Occur for a Plant to Initiate