How odd, my comment was allowed to stand for a couple of days and was then deleted.
They must have missed that one, or got bored and re-read the thread again for further infractions.
It seems we REALLY are not permitted to discuss anything you would find in a 1st year biology textbook.
Scratch that, in a nursery book.
(although looking at the books teachers are trying to push nowadays, maybe I'm not so sure?)