Yes the possibilities are unlimited for all kinds of super-plants multi-headed wheat, or stems growing full of ears of corn when much more foods need to be supplied out of increasing limited cultivatable land multi-limbed chicken and the list could go on and on Human are likely to mess themselves up with infinite ways to modify their looks at will if not to find ways to alter their souls Perhaps Buddha with thousand hands weren't completely out of imaginations to start with Dragons and phoenix were early breeds long before human