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1 All dinosaurs originated from sauropods. Currently, it is believed that the first sea creatures were born from thunder synthesis. They have only one cell, and then the gene mutates, more gene types appear, and then the fittest is eliminated, and the unsuitable is eliminated.
Late vertebrate plants in the sea climbed ashore from the sea. These plants took over the world before the age of the dinosaurs, including Heterodontosaurus.
3 Living in the Triassic period, about 100 million years ago, heteroptera had long fins on their backs, about meters long, and their backs were covered with scales.
In order to catch prey, speed is especially important. The tail acts as a balancer by holding up the body with its forelimbs, and the entire body is centered on the belt, developing into a dinosaur with a special reptilian form.
At the end of the Triassic, the environment improved and most species became extinct. In order to conform to the a priori environment, the organism begins to degrade again.
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Dinosaurs evolved from reptiles to protosaurs. At first, from soft and boneless creatures, fish with internal skeletons evolved into land-walking amphibians, and then reptiles. One of these reptiles evolved into the Archosaurus.
The first dinosaurs were smaller, bipedal carnivores, but large quadruped plant-eating species also evolved at the end of the Triassic. During the Jurassic and Cretaceous periods, dinosaurs diverged into a large and small number of carnivorous and bulky plant-eating animals, small, fast-moving plant-eating animals, and other groups with large bone plates, horns, decks, and hammer defense organs.
All dinosaurs originated from the order Alodontida, and the explanation for dinosaurs walking upright on all fours is that the earliest archosaurs lived on plateaus, and the individuals were small or medium-sized carnivores, because catching prey required agile running, therefore, the archosaurs developed different postures, among which one of the dinosaurs slowly stood upright limbs.
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In the late Permian, there were two distinct trends in the evolution of life, and both had a profound impact on the history of the Earth. One of these trends is called dinosaurs, and the other is called mammals.
Before the advent of dinosaurs, lizard-type species had appeared on the earth, and although they were not as large as dinosaurs, they had a certain advantage over other animals at that time. Paleontologists believe they were the prototypes of the dinosaurs that came later. Lizards appeared in several geological epochs before the Triassic – the Carboniferous period (100 million to 100 million years ago).
In that time appeared what is believed to be the world's first reptile :
West Lothian lizard. By the Permian period, a geological epoch before the dinosaurs, reptiles were becoming more diverse and closer in shape to those of the earliest dinosaurs. The Permian was a relatively arid era, and deserts were common.
During the same era, lizards living in groups like the Ichirasaurus and Heterodontosaurus were active in desert oases. During the Late Permian, there were two distinct trends in the evolution of life, both of which had profound implications for the history of the Earth. One of these trends is called dinosaurs, and the other is called mammals.
How did dinosaurs become extinct?
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The ancestor of the dinosaur is the allegodontosaur, the middle Permian, but it is not a dinosaur, the dinosaur appeared in the Triassic, the earliest carnivorous dinosaur: Archaeoptera, the earliest herbivorous dinosaur: Platesaurus, and then to the Jurassic dinosaur species are not many, the climate is humid, to the Cretaceous dinosaurs began to flourish, there are about 700 kinds of dinosaurs, in 65 million years to extinct, some people believe that today's birds are evolved from dinosaurs.