Previous efforts to produce teeth in chickens had relied on introducing genetic information from mice, resulting in chickens growing mammalian molars. But a chicken's underlying ability to grow teeth derives from a common ancestor with alligators--archosaurs--that is more recent than the one linking birds and mammals.uring that time, the same two tissues from which teeth develop in mammals come together in the jaw of the mutant embryo--and this leads to nascent teeth, a structure birds have lacked for at least 70 million years. They don't make a molar, explains development biologist John Fallon, who oversaw Harris's work.
The name Journey is of Latin origin. The meaning of Journey is journey. Journey is generally used as a girl's name. It consists of 7 letters and 2 syllables and is pronounced Jour-ney.
Full Definition of TREK. 1. chiefly South African: a journey by ox wagon; especially: an organized migration by a group of settlers. 2. : a trip or movement especially when involving difficulties or complex organization: an arduous journey. to walk usually for a long distance. : to travel by walking through an area with many mountains, rivers, etc., for pleasure and adventure. : to go on a long and often difficult journey.