Not that we know of ... not yet. That's my point. Remember, it wasn't that long ago that we believed humans thought with their heart, that bloodletting was the healthy way to exorcise demons from the body, and many still refuse to believe we descended from the same evolutionary branch as apes. As we learn more about life as a whole, we might be surprised at how it works in all living things. After all, SOMETHING is driving plants to reproduce.

My comment wasn't at all meant to offend. Vegetarianism is a choice, and I'm all about choice. I certainly respect vegetarians for their choices, but only ask the same respect for evolution and the food chain in return. Since most vegetarians are also liberals, this shouldn't be a stretch.