[inglorian]

Actually, it doesn't really matter. Some argue that industrialized agriculture is in fact playing right into the plants' design. We contribute to their survival and spread by continually re-planting them -- corn, for example, is arguably the king of this kind of adaptation. For more on this, I highly recommend Michael Pollan's "Botany of Desire" or, for a shorter version, his TED talk on the same subject.

[kscaldef]

I'm fine with that argument (although it seem to apply to raising animals as well). I was responding more to the parent's suggestion that certain parts of certain plants are designed to be eaten (and then pass through your digestive system and re-seeded). That bit of natures design doesn't work so well in the face of modern plumbing.