How did the first dinosaur come out and how did the first dinosaur come out?

It first evolved from a single-celled organism in the ocean.

After the adult fish, the fish evolved limbs to become amphibians, and then the amphibians gradually evolved their gills to become reptiles.

Later, in order to gradually adapt to the survival of the land, they evolved into dinosaurs.

The first dinosaur to be named, Megalodon.

Large carnivorous dinosaurs with large, serrated teeth with long roots fixed to the jawbone.

Inside, the tips of the teeth are bent backwards and lodging, like sharp knives with serrated teeth. They usually hunt on a small scale. The first fossil remains of a megalodon were discovered in 1818 in the slate of the Oxfordshire Quarry in England.

Since then, as many as 25 dinosaurs have been named megalodons. In fact, this name has been given to many theropod dinosaurs whose identities are not clearly identified.

The huge jaws and other bones found in the quarry prove that Megalodon was a large, terrifying carnivorous dinosaur.

Megalodon was longer than two rhinoceros, twice as tall as an adult. Its large mouth is covered with large, pointed teeth, each of which is the size of a small mammal of the time.

of the entire jaw. The teeth are curved with serrated edges, and the roots grow deep in the jawbone. This way, even the most intense biting battles will not loosen the teeth.

Gentle plant-eating dinosaurs were no match for the hungry megalodons. In addition to its terrible mouth, it also has powerful ** on its hands and feet - long claws. Claws are used to tear open the tough skin of the prey and then shred the flesh underneath the skin.

Megalodon was the first dinosaur to be scientifically described and named, and it was a massive animal and a beast that brutally preyed on other animals. It has a large head and a strong upper and lower jaw.

It has curved teeth in the middle, like a dinner knife for cutting steaks, and serrated at the tip, which is used to bite fresh prey. With sharp claws on its "fingers" and "toes", it was able to attack forest-type herbivorous dinosaurs at any time. The remains were very fragmented, and may have been mixed with fragments of other theropod bones.

Lived in Africa during the Late Jurassic period.

Dinosaurs evolved from a certain creature, and when it had certain characteristics of a dinosaur, it became a dinosaur.

The common ancestor of dinosaurs and living reptiles, Lao Jian was a small lizard-like animal named "Yang's crocodile", about 30 centimeters long, walking and staggering, catching insects for a living, their offspring clearly divided into two branches, one was the real lizard that continued to eat insects, and the other was a semi-aquatic early type of primosaurus.

Dinosaurs originated from microorganisms that lived in the ocean billions of years ago, and gradually evolved from microorganisms to fish, and due to the increasing number of marine organisms, fish evolved into amphibiotics that walked on land, and then evolved into reptiles, and evolved into dinosaurs after billions of years.

Dinosaurs are vertebrate reptiles, there are about 900 to 1,200 species of dinosaurs, and reptiles have flourished for about 150 million years in the history of the earth.

Between 570 million and 248 million years ago in ancient times, soft, boneless organisms evolved into fish with internal skeletons. Fish, in turn, gave rise to land-walking amphibians, which then evolved into reptiles. One of the reptiles evolved into the Primosaurus.

The earliest dinosaurs appeared about 240 million years ago, and were born in the terrestrial swamps of the Mesozoic Era, with a long middle neck and tail, and longer hind limbs than the forelimbs and tails, which could stand upright. Some of them are herbivorous and some are carnivorous, the smallest size is equivalent to a chicken, the largest can be up to 40 meters, and some dinosaurs may live up to 200 years, and they are huge, the largest of the land animals.

The habits of dinosaurs: foraging for food, fighting.

1.Foraging.

Herbivorous dinosaurs were limited by their height in the plants they could eat, so some small herbivorous dinosaurs would stand on their hind legs in order to eat the leaves of plants at high heights. Carnivorous dinosaurs fed on herbivorous dinosaurs and other animals. The different foraging patterns of various dinosaurs are also reflected in their teeth.

2.Struggle.

Sharp teeth and claws were preyed upon by carnivorous dinosaurs. Tyrannosaurus dinosaurs often went it alone because they sought out lone herbivorous dinosaurs. Some dinosaurs would move in groups, locking on to their prey and swarming and slicing open the prey's abdomen with the second finger of their claws.

The first dinosaur was not a dinosaur in the true sense of the word, because it had not yet evolved and had only a preliminary form of a dinosaur.

The origin of dinosaurs remains a mystery. Most paleontologists believe that they evolved directly or indirectly from the early or middle Triassic progenitorium. There is a school of thought that the three orders of dinosaurs had a common ancestor, and that they evolved from a single group of alveolars.

The other school claims that the dinosaurs evolved from the early or middle Triassic alveolar tooth into two genealogical families. Norman (1985) proposed that the first progenitores apparently lived in the highlands and were small, medium-sized carnivores. These ancestral dragons developed different postures in order to be more agile in running and moving to catch their prey.

This also gives them a chance to grow into large predators. These predators have the potential to run quickly when they develop an upright posture that allows their limbs to be directly attached directly below their bodies, improving their movement behavior.

Speed is particularly important when it comes to catching prey. The highest rate will be supported by using the long hind limbs to lift the body off the ground; The forelimbs are lifted up, and the tail is used for balancing purposes. The entire body will use the belt as a turning pivot to develop an improved structural form.

These development processes are estimated to have been completed in the early Middle Triassic.

The earliest progenitor morphology will closely resemble Pike crocodiles. In pike crocodiles, the skull is quite large, and the teeth are buried deep with very sharp serrated edges. At the same time, there is a preorbital opening in front of the skull before the orbit.

This feature is similar to that of dinosaurs. The pike crocodile is a small alveolar tooth that crawls on a four-legged crawl. His hind limbs are longer than his forelimbs, and he also has a long, muscular tail.

It is an extremely active predator. It is presumed that in the early part of the Late Triassic (about 200 million years ago), a species of progenitor similar to the Pike-crocodile must have evolved into the first carnivorous dinosaur ancestor. Noisy.

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.