Final answer:
Defensins in plants are visible in response to herbivores; they are a chemical defense mechanism used to protect the plant against various biological and environmental stresses.
Step-by-step explanation:
We can see defensins in plants in response to herbivores. Defensins are part of a plant's immune response and act as a chemical defense to protect against infections, herbivory, and other environmental stresses, thus affecting the plant's dynamic homeostasis. They are small cysteine-rich peptides thought to inhibit the growth of microbes and serve as a deterrent for insects and other herbivores that may attack the plant. This response falls under the category of induced defense mechanisms that plants use to protect themselves from potential harm.