A special type of reptiles called "Archosaurs."
Dinosaurs played only one game; "Catch It And Eat It". We can't be sure about the diet of most predatory dinosaurs, but in general, carnivores will eat anything they can catch.
The main types of herbivorous dinosaurs are ornithopods, ceratopsians, Thereophora, and sauropods. A few types of theropods were herbivorous, too.
brontosaurus
i assume your question is as follows: first living; dinosaurs or jelly fish? cnidarians (the phylum that contains both jellies and corals) predate dinosaurs and land animals in general. they predate the dinosaurs by about 400 million years. they've been around for a while, and are some of the oldest known fossils we have found.
HA! there are no genetic mutations! DINOSAURS ARE DINOSAURS! DINOSAURS ARE DINOSAURS! no mutants
Dinosaurs Dinosaurs Dinosaurs - 1985 TV was released on: USA: 1985
No, dinosaurs existed during the Mesozoic era, which ended about 66 million years ago. The Cenozoic era began after the Mesozoic era and continues to the present day, during which mammals became the dominant land animals.
Birds are believed to have evolved from theropod dinosaurs during the Mesozoic era. The fossil record shows a gradual transition from small, feathered dinosaurs to early bird species, which eventually led to the wide diversity of bird species we see today.
Dinosaur names are typically capitalized when they refer to a specific genus or species, such as "Tyrannosaurus rex" or "Velociraptor mongoliensis." However, when referring to dinosaurs in a more general sense (e.g. "the carnivorous dinosaurs"), they are not capitalized.
Platypuses are not dinosaurs; nor are they related to dinosaurs.
Sharks are Sharks and dinosaurs are dinosaurs. But there were animals recognizable as Sharks living when the dinosaurs did.
Young dinosaurs would have been called hatchlings. If you are asking what evolved from dinosaurs, the only descendants of dinosaurs are the birds.