During which period did the dinosaurs first appear?
Dinosaurs evolved from reptiles not the other way around. The first reptiles where thought to have evolved during the late Carboniferous Period about 320 to 310 million years ago. Dinosaurs do not appear in the fossil record until the late Jurassic Period about 230 million years ago. They evolved from the reptilian infra class Archosaurs.
The Mesozoic Era in the Triassic Period. Dinosaurs first appeared during the Triassic Period (250-230 million years ago) and were on the Earth through the Jurassic Period (200-145 million years ago) until the end of the Cretaceous Period (65 million years ago). This whole era is called the Mezozoic Era (250-65 million years ago). Dinosaurs are classified as a diverse range of reptiles, but the first true dinosaur evolved from Archosaurs (Ruling Lizards).
The Mesozoic era is divided into three periods Triassic, Jurassic and Cretaceous. During the early Triassic, corals appeared. Seed plants dominated the land, in the northern hemisphere, conifers flourished. Glossopteris was the dominant southern hemisphere tree during the Triassic period. Many new dinosaurs appeared during the Jurassic period. Giant plant eating dinosaurs dominated the Earth. carnivores such as Allosaurus and Composognathus were plentiful. Many bird-like dinosaurs also thrived during this period. The Cretaceous period saw…
Fossilised remains of "turtles" have been found dating back to the Cretaceous period in Earth's history (this period ended around 65 million years ago).... However Dinosaurs have been on the planet for a MUCH greater length of time, it is debated slightly when the first dinosaurs appear but it is alleged to be over 200 million years ago. Therefore dinosaurs would have become before turtles
Jurassic perios the Jurassic period was when the first bird, archaeopteryx, appeared Toward the end of the Jurassic Period, one of the first birds, Archaeopteryx (ahr-kee-AHP-ter-iks), appears. An interesting addendum is that Archaeopteryx is an almost perfect intermediate between the dinosaurs and the birds. It has a series of characteristics that are definitely dinosaurian, yet it has feathers, a wishbone, and wings
No. There were no dinosaurs in the Permian period. The first dinosaurs appeared about halfway into the next period: the Triassic. Pterosaurs, flying reptiles that are often incorrectly called dinosaurs appeared a few million years after that. Birds, which are true flying dinosaurs, first appeared in the late Jurassic period. The only flying animals in the Permian were insects.
There were ancestors of snakes that had feet during the time of the dinosaurs. But the mere fact that they had feet meant that they would be considered snakes. Instead they were more like modern lizards. The first snakes appeared during the Cretaceous period when dinosaurs still dominated the earth.