What did t-rex evolve from?

Where is dewlock in the devourer saga in Adventure Quest? Is there any investigatory project that uses lanzones as a mosquito killer? Is the Jurassic period a geologic time that followed the mass extinction of dinosaurs? What was the t rexs tail used for? How big were spinosaurus teeth? Which were small and minor parts of terrestrial life during the Jurassic period? Are there any type of dinosaurs still alive today? How did velociraptors make their nest? Is micropachycephalosaurus the smallest dinosaur? What dinosaurs have names ending in 'n'? How can dinosaurs fossil are found on different continents? What color is dragon tears? Were all dinosaurs big? Who is rex's brother in generator rex? How would you describe the eating habits of a T. rex and a? What was the earth like when triceratops was alive? What is the dinosaurs that spits black spit like acid and frills up called? Do you wish dragons exist? What are the most secret dragons in DragonVale of all? How far can a t-rex travel in a day?