How does the jet stream move storms across north america?

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.