The remarkable repeated evolution of herbicide resistance

Perhaps, when teaching students about plant defense, you show pictures of the long spines of the African acacia tree or use caffeine as an example of a plant toxin. Plants have evolved a mind-boggling array of solutions to the problem of being damaged, and these extreme examples of defense are useful and engaging when initiating students into the remarkable world of botany. In my opinion, there is no example of plant defense quite as intriguing...