Birds have dinosaur blood, so why don t they dominate the land like dinosaurs?

Birds have dinosaur blood, but they do not dominate the land like dinosaurs, this is because the strength of birds is very weak, and they can only fly in the air, and they cannot attack some powerful animals on land, so their combat effectiveness is not particularly strong, and they cannot dominate the land.

Dinosaurs are also divided into many species, the ancestor of birds is Archaeopteryx, although it is a kind of dinosaur, but it is not very powerful, it can even be said that in the world of dinosaurs it is only the bottom of the food chain, and limited by size and predation methods, natural beauty like other dinosaurs dominate the land.

Because they are very small in size and are descendants of those small dinosaurs, they cannot dominate the land.

In fact, the skeletal structure of all terrestrial vertebrates is similar because they all share a common ancestor.

As for the similarity between the bones of some dinosaurs and the skeletons of birds, it is because birds evolved from some kind of small theropod dinosaurs.

Paleontologists have discovered fossils of Archaeopteryx, the oldest known bird ancestor to date, and have shown that Archaeopteryx is the closest relative, to carnivorous theropod dinosaurs.

Fossils show that the hands of Archaeopteryx were very different from those of modern birds, closer to theropod dinosaurs, the most obvious feature is that it had three fingers with sharp claws, and the overall shape is almost the same as that of dinosaurs such as Microraptor and Ornithistosaurus; The second toe of Archaeopteryx is somewhat specialized, closer to the second toe of dinosaurs such as Microraptors; Its jawbones radiate in all directions and have obvious theropod genetic characteristics.

The microstructure of dinosaur bones also shows similarities to birds. By looking at skeletal slices of different species of dinosaurs, it was found that dinosaurs were generally closer to birds, and that they grew at a significantly faster rate than most reptiles. This rapid growth pattern is generally seen in homeotherms (what we often call hot-blooded animals), which indicates that dinosaurs had similar physiological characteristics to modern endotherms.

This speculation is supported by other evidence, such as the fossil of a meosaurus found in western Liaoxi, China, which shows that the dinosaur, like birds, hid its beak under its wings to keep warm during sleep; Stable isotope analysis of the teeth of some sauropod dinosaurs showed that these dinosaurs had a stable body temperature, most likely over 30 degrees.

Paleontologists have discovered a nearornithosaurus fossil about 100 million years ago in Jianchang, Liaoning Province, China. The long, stout forelimbs of the near-ornithosaurus had flying feathers, arranged in a manner similar to bird flight feathers, indicating that the rudiments of the wings appeared on the dinosaurus of the dinosaurus hundreds of millions of years ago. Several other theropod dinosaurs, like Microraptor and Tailfeather-like dinosaurs, had structures that resembled feathered wings.

It is precisely because birds evolved from dinosaurs that they have a similar bone structure.

The relationship between birds and dinosaurs is still difficult to explain.

In 1861, a fossilized skeleton of an ancient vertebrate with feather imprints, larger than a pigeon and smaller than a chicken, was discovered at the limestone quarry in Sorenhofen, Bavaria, Germany. The fossils date back to the late Jurassic period, about 100 million years ago. Later, a total of six such fossils were found in this area, which is known as Archaeopteryx fossils.

The skeletal structure features of Archaeopteryx prove that its ancestors must have been reptiles. But what kind of reptile descendants are it? Scientists are arguing.

In general, there are three major hypotheses for the origin of birds. One is that birds originated from dinosaurs; The second is that birds originated from allotent reptiles and are close relatives of dinosaurs; The third is that birds originated from crocodiles.

Each of the three hypotheses has its own evidence, but from the current fossil data, the evidence for the origin of dinosaurs is more sufficient.

Most dinosaur experts now believe that birds evolved from dinosaurs. It is said that the ancestor of birds was a small, bipedal, lightweight, agile theropod dinosaur, probably a hyposiosaurus.

Archaeopteryx is an intermediate type of dinosaur to bird evolution. It has both reptilian and bird characteristics.

However, the exact origin of the birds from reptiles is still in dispute.

Some biologists believe that the ancestors of modern birds evolved directly from some kind of dinosaur.

Birds first appeared in the Jurassic period, and the exact origin of reptiles and birds is still very controversial among paleontologists.

Birds are a group of higher vertebrates that evolved from ancient reptiles and adapted to flight.

Archaeopteryx is the ancestor of birds and lived in the Jurassic Age, about 155 million to 150 million years ago, so it is also rated as the world's earliest bird. These specimens are found only in Germany. Its plumage (less evidence than other features) is similar in structure and design to modern bird feathers.

But apart from some similar features to birds, it has many characteristics of theropod dinosaurs. Unlike today's birds, Archaeopteryx had tiny teeth that could be used to hunt insects and other tiny invertebrates. Archaeopteryx also had a bony tail and a three-toed claw on its feet, which closely resembled dinosaurs.

Because of its bird and dinosaur characteristics, Archaeopteryx is generally thought to be the link between them: probably the first creature to transform from a terrestrial creature to a bird. In the 1970s, John Ostrom suggested that birds evolved from theropod dinosaurs, and that Archaeopteryx is the most important evidence of this.

It retains some of the characteristics of birds, such as wishbones, feathers, wings. It also has some dinosaur features, such as a long ascending process of the talus, interdental plate, ischial process, small bones in the preorbital foramen on the top of the head, and a long herringbone tail. Ostrum also found that Archaeopteryx was significantly similar to Chisauridae.

As early as the 19th century, the British scholar Herdanley noticed that dinosaurs and birds had many similarities in bone structure. But after studying a large number of dinosaur genera and bird fossils, scientists have suggested that birds are not only related to dinosaurs, but also likely descended from a small dinosaur. According to this hypothesis, some dinosaurs that are closely related to birds should have feathers, but no fossil evidence has been found, and at the end of the 20th century, Chinese scientists found dinosaur fossils with feathers for the first time in western Liaoning.

Researchers all over the world were ecstatic, and Liaoxi discovered and showed the world evidence of dinosaur feathers. The picture painted by the biologists was the finishing touch.

It's purely self-searching, don't spray if you don't like it).

It's that they've changed over billions of years.

It is said that chickens are descendants of dinosaurs, and some people are working on this research

Get out of the way, haha, okay.

The birds of the "Wonderful Animal Kingdom" are related to dinosaurs and originally evolved from dinosaurs.

What is the relationship between dinosaurs and birds?

No, I don't know? Hahahahaha.

I don't know! I don't know!

Birds are descendants of a small dinosaur.

It's related by blood because they look like and they're grandparents.

Summary. Pro, 2 is because of feather changes, 3 is limbs.

Hello! Dinosaurs are not the ancestors of birds because dinosaurs are not the ancestors of birds because dinosaurs and birds have different evolutionary histories. Dinosaur scattering is a class of ancient reptiles, whereas birds are a class of ancient flying animals.

The common ancestor between dinosaurs and birds was an ancient class of reptiles, which evolved into dinosaurs and birds, respectively, during the evolution of the rough Zen.

The teacher is question 3 in the test paper, how to answer it.

Pro, 1 is because of the evolution of the bones, their collarbones have undergone different changes in the evolution of the pro, and it cannot be said that dinosaurs are not the ancestors of birds.

Teacher, what is point 2, point 3.

Pro, 2 is because of feather changes, 3 is limbs.

Teacher, how to answer the third question?

Dear, what you want to ask is why mosquito injections don't hurt?