Interesting; thanks. Been over 30 years since I had a class that even remotely covered such. And the Beatrix Potter tidbit was most interesting, too.
As for the carrot, with proper storage, they can live for months. If they still have the part of the greens on the top, you can trim & decapitate it, so to speak, and plant the top. You won’t really get a new long, fat carrot, but with proper care, being a bienniel, it may flower and produce seed.
OTOH, I always view cows not as herbivorous animals, but as a machine invented by bacteria to carry them around and feed them, then they use their waste products to power the cow.
Wish I could do the same for my vehicles. OTOH, a cow can’t do 0-60 in under 10 seconds, or carry over a ton of payload several hundred miles per day.