Dinosaur reptiles? Warm blooded or cold blooded? Why are warm blooded birds called descendants of di

Dinosaurs are reptiles, they are cold-blooded animals, and the ancestors of humans are also cold-blooded animals, and warm-blooded birds are called descendants of dinosaurs because animals will evolve in order to survive better, evolving from cold-blooded animals to warm-blooded animals.

The category of dinosaurs is too big, and it is indisputable that they belong to reptiles.

As for the warm and cold blood, the jury is still inconclusive.

And whether the birds are descendants of dinosaurs or not, there are also different theories.

Dinosaurs were reptiles and were cold-blooded animals, and warm-blooded birds evolved from dinosaurs.

Birds are the result of reptile evolution, but in a different direction than mammals. In the late period of dinosaurs, there was a feathered and flying "Chinese ornithosaurus", which was very similar to the later Archaeopteryx, so birds evolved from dinosaurs.

Evolve! We share a common ancestor with dinosaurs.

New research shows that dinosaurs were warm-blooded, not cold-blooded, and had a similar body temperature as humans.

Were dinosaurs cold-blooded or warm-blooded? Scientists have long had different views on this issue. A new study shows that dinosaurs had body temperatures between 35 and 40 degrees Celsius, suggesting that they were not cold-blooded but warm-blooded.

A team led by Professor Hagitaffek of the Institute of Earth Sciences at the Hebrew University of Jerusalem published in the latest issue of Science Advances said they had studied three different fossilized dinosaur eggs that existed in the evolutionary path from reptiles to birds.

By analyzing the isotopic signatures of calcium carbonate minerals in eggshells, the temperature of these eggshells at the time of formation in the dinosaur body was calculated, so as to infer the body temperature of the dinosaurs. Comparing the body temperature of the dinosaurs, the results showed that the body temperature of these dinosaurs was between 35 and 40, which is about the same as the body temperature of humans today.

The global climate during the age of the dinosaurs was much warmer than it is today. Therefore, simply measuring the body temperature of dinosaurs living near the equator does not tell us whether they are cold-blooded or warm-blooded, because their body temperature may simply be a cold-blooded reaction to the hot climate they are in," Afik said.

The researchers then focused on dinosaurs at high altitudes in places like Canada to confirm that their warm body temperatures were the result of internal metabolic warming processes, rather than just reflecting the surrounding climate. Scientists analyzed the fossils of some cold-blooded mollusks that lived in the same area as these dinosaurs and deduced that some mollusks had a body temperature of about 26, which reflects the temperature of the environment at the time.

As a result, researchers believe that these dinosaurs were not cold-blooded animals whose body temperature changed with the ambient temperature, but warm-blooded animals that could maintain their body temperature on their own metabolism.

Dinosaurs are thought to be neither warm-blooded nor cold-blooded, but mesothermians in between.

Modern research suggests that the idea that dinosaurs were either warm-blooded or cold-blooded is too simplistic. Assessing the metabolism of a large number of dinosaurs, mainly based on the dinosaur's body mass—inferred by the weight of the thigh bone—and its growth rate—was estimated primarily by the growth rings in the fossil bones, and the results showed that the growth rate and metabolic rate of the dinosaurs were characteristic of neither cold-blooded nor warm-blooded organisms. They are neither like mammals or birds, nor like reptiles or fish.

They possess a growth rate and metabolic rate that is between that of modern cold-blooded and warm-blooded animals.

Researchers refer to this life with a moderate metabolic rate as a "mesothermal organism".

Such animals can now be seen as well. Like dinosaurs, certain modern animals, such as great white sharks, leatherback turtles, and tuna, cannot simply be classified as any one category, and they are also mesothermal.

Warm-blooded animals, that is, homeothermic animals.

Whether a dinosaur is warm-blooded or cold-blooded frozen dinosaurs should be cold-blooded.

Were dinosaurs warm-blooded, or cold-blooded? Dinosaurs were certainly warm-blooded, not cold-blooded.

Dinosaurs were actually somewhere between cold-blooded and warm-blooded.

Scientific studies have evaluated 21 dinosaur species, including a range of mammals, birds, bony fish, sharks, lizards, snakes and crocodiles. The results showed that the growth rate and metabolic rate of dinosaurs were not characteristic of cold-blooded organisms or warm-blooded organisms.

They are neither like mammals or birds, nor like reptiles or fish, but somewhere between modern cold-blooded and warm-blooded animals. In short, their physiology is not common in modern society.

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?

Dinosaurs had egg-hatching behavior, which is the egg-hatching behavior that birds learned from their dinosaur ancestors. The vast majority of the dinosaurs of the previous egg-stealing family were warm-blooded.

Probably a perfect breed with all sorts of advantages.

Were dinosaurs cold-blooded, or warm-blooded? Biologists currently hold two very different views, both of which are based on the current state of animals on Earth.

Scholars who hold the view of cold-blooded (ectothermic) animals mainly base their argument that dinosaurs, like reptiles now, belong to relatively lower animals, and crocodiles, frogs, and snakes are typical cold-blooded animals. The body temperature of these animals rises and falls with the change of external temperature, which can save the consumption of physical energy, do not need to have a strong heart to maintain blood circulation, and do not need to have sweat glands on the **, sweat when encountering high temperatures, and are used to maintain a constant temperature of all parts of the body. Most cold-blooded animals have the property of "hibernating", find a cave with a suitable temperature to prevent the body temperature from dropping below 0, otherwise it will freeze to death.

As a result, other scholars have proposed that dinosaurs were "warm-blooded" animals with a constant body temperature, just like elephants today. According to the theory of evolution, there is a dinosaur that is the ancestor of flying birds. You must know that dinosaurs also lay eggs, and like birds, recent excavation of dinosaur fossils found traces of soft tissue feathers, while birds are warm-blooded animals, with a constant body temperature, and their feathers are to keep out the cold.

This doctrine also seems to make sense.

Were dinosaurs cold-blooded, or warm-blooded? The jury is still inconclusive. No one can justify it, but this topic is very important and crucial to the life and extinction of dinosaurs, and people are waiting to unravel this "natural mystery"!

Yes, except for birds and mammals, which are homeotherms, the rest are ectotherms (cold-blooded).

Probably not?!

The earth has four seasons, if the dinosaurs were colder animals, wouldn't they hibernate in winter? If a comet does hit the ground, I'm afraid these hibernation sites should be able to retain some dinosaur species, right?