RNA has great capability as a genetic molecule; it once had to carry on hereditary processes on its own. It now seems certain that RNA was the first molecule of heredity, so it evolved all the essential methods for storing and expressing genetic information before DNA came onto the scene.
Marginocephalia, ceratopsians - like the triceratops. These dinosaurs are usually depicted with two horns coming from the top of orbits and one from the top of the nose. They also present pointed teeth and a mouth with very prominent maxillary bones. These animals were <span>herbivorous and all these structures served that type of food.</span>
