Defence against herbivory
The "escape and radiation" mechanism for co-evolution is the idea that adaptations in herbivores and their host plants have been the driving force behind speciation. The adaptations have played a role in the radiation of insect species during the age of angiosperms. Some herbivores have evolved ways to hijack plant defences to their own benefit, by sequestering (keeping) these chemicals and using them to protect themselves from predators.