Giraffes have long necks, why? Is it due to evolution?

Giraffe. The neck is so long, it is due to the result of natural evolution. In the beginning, because of the herbivores on Earth.

More and more, the lawn has long been insufficient to eat, so the giraffe will find a way to eat the fallen leaves of the branches, and to eat this kind of leaves, you must stretch your neck to eat steadily, along with the long size of the plant and the giraffe want to eat a lot of leaves, stretch the neck and apply the neck for a lot of time. Giraffes have slowly lengthened their necks in order to better integrate into the production and manufacturing needs in millions of years of evolution, and these short-necked giraffes that cannot eat fallen leaves have been replaced by nature.

Giraffes' necks are getting longer and longer, mainly as a result of natural evolution and selection. In the first cases, the neck of the giraffe was not so long, and it varied in length, and then in the drought stage, many of the greenery on the ground withered, and the remaining grass was eaten by other small animals. In order to survive better, giraffes are forced to eat the leaves of tree branches, and at this moment the short-necked giraffes highlight their shortcomings, they only eat the leaves of dwarf flowers and trees, and then they are eliminated when they are not enough to eat.

And these giraffes with longer necks can eat high-altitude leaves, and in order to survive better for a long time, stretch their necks as much as possible to eat a large number of leaves, so that their necks grow and develop more and more long, and after inheriting the genes of their offspring, the genes of long necks are determined. The giraffe's elongated neck appears to be the result of the giraffe's hard work, but in fact it is the result of the theory of natural selection.

Naturally, this is only the inference of modern scientists, and there is no direct evidence of the actual situation for the time being, why the giraffe's neck is so long, and experts have been in a dispute about this matter. There is also a view that the neck will be so long when the giraffe occurs, and I think that the genes of this group are originally like this, and there is a long neck just after being created, after all, the neck of the giraffe is indeed too long, and it is very easy to evolve the neck into 3 centimeters, more than ten centimeters, and how many meters to evolve looks a little fantastical, so it has a view of genes after all.

Giraffes have long necks because their ancestors have always tried to stretch their necks, and this trait of long necks has been inherited.

Giraffes' necks are very long, this is because of the existence of mutations, some have become long necks, some may become short necks, and some are not long or short, but because of natural selection, the long necks remain.

As a result of natural evolution, giraffes have long necks, which is the result of planning, which is also relatively normal.

It is formed because of development, but in order to compete with other animals. It's really because of evolution, because they have to evolve this kind of body structure if they want to survive better.

The evolutionary process of giraffes is as follows:

1. The giraffe family is the most unique type of artiodactyl, the teeth are the primitive low-crown type, can not be the main diet of grass, can only feed on leaves, the tongue is long, it can be used for feeding, there are short horns on the head, and the horns are covered with hairy **. There are only 2 species of giraffe in Africa, and the prehistoric distribution is more extensive, which can be divided into the subfamily Gulinidae, the giraffe subfamily and the subfamily Cirva.

2. According to the fossil record, giraffes were first differentiated from cervids in the early Miocene. The earliest giraffe fossils are climacoceras and canthumeryx. Later, it evolved Gulin, an early Miocene giraffe ancestor with short horns and short necks.

By the late Miocene, Gurin evolved into Satsuma. In the Pliocene, the satsuma beast diverged into the okapi and the early modern giraffe.

3. The giraffe subfamily is a giraffe that lives in the savanna area, because the trees in the savanna are mostly umbrella-shaped, and the leaves are concentrated in the upper layer, the giraffe silver friend has evolved a longer neck and limbs, and can eat the leaves. There is only one species of giraffe in the subfamily Giraffe of the Flap Acacia subfamily, which is widely distributed in the savanna region of Africa, and is the tallest living animal and one of the most familiar African animals.

Giraffe.

The giraffe, belonging to the phylum Chordates and the Giraffe family, is a ruminant cloven-hoofed animal that grows in Africa, and its Latin name means "leopard-patterned camel". They are the tallest surviving terrestrial animals in the world. The protection level is vulnerable.

Giraffes did not evolve. The giraffe's size is very special, and its existence requires a very complex and irreducible organizational structure at the same time, and neither of them can be completed through evolution.

First, a super big heart. A giraffe's long neck necessarily requires it to have a large heart in order to carry blood to its head. However, it is well known that many people in the world today do not have a blood supply to the brain, but their hearts and their offspring have not enlarged.

Second, the perfect solution to the danger of violent death. Because the neck is too long, it is necessary to have extremely high blood pressure to pump blood to the brain. But the question is, what to do with giraffes drinking water?

With such high blood pressure, when they lower their heads, the blood will inevitably burst through the blood vessels in the brain and they will die violently. But the amazing thing is that the giraffes have a special reticular hemangioma in the back of their brain, and when they bow their heads, this tissue buffers the flow of blood to the brain, preventing sudden death. So how did this organization evolve?

When giraffes can't go without drinking water, in other words, whether they have this organization or not directly determines whether they can survive or not, and this organization is a prerequisite for their survival, and it cannot withstand the long evolutionary time.

Third, resilience**. Or because of high blood pressure, giraffes are bound to be difficult to stop bleeding once they bleed, but fortunately they are very tough. We often see lions trying to prey on giraffes, but their claws can't pierce the giraffe's **.

In summary, the giraffe's long neck determines that it must have many complex irreducible organizational characteristics. This suggests that it was designed, not evolved.

The reason why a giraffe's neck is so long is because of the result of natural evolution. In the beginning, due to the increasing number of herbivores on the earth, the grass was no longer enough to eat, so the giraffe tried to eat the leaves on the trees, and to eat these leaves, they had to stretch their necks to eat, and as the trees grew taller and the giraffes wanted to eat more leaves, they had more time to stretch their necks and use their necks. Giraffes have gradually lengthened their necks in order to adapt to the needs of production in the course of tens of millions of years of evolution, while those short-necked giraffes that cannot eat leaves have been eliminated by nature.

Giraffe's Neck The giraffe's neck has become that long mainly as a result of natural evolution and selection. In the early days, giraffes' necks were not so long, and they were long and short, and later in the drought period, many of the plants on the ground died, and the remaining grass was eaten by other animals. In order to survive, giraffes have to eat the leaves of trees, and this is when short-necked giraffes show a disadvantage, they can only eat the leaves of low trees, and then they are eliminated when they do not have enough to eat.

As a result of natural evolution and selection, those giraffes with longer necks can eat higher leaves, and in order to survive for a long time, they try to stretch their necks to eat higher and more leaves, so that their necks grow and develop again and become longer and longer, and after inheritance from generation to generation, the genes for long necks are determined. The giraffe's longer neck looks like the result of the giraffe's efforts to survive, but it is actually the result of natural selection.

Of course, this is only the speculation of modern scientists, and there is no substantial evidence for the time being, and scientists have been debating why the giraffe's neck is so long. There is also a saying that the giraffe had such a long neck when it appeared, thinking that the genes of this species were originally like this, and it had a long neck when it was just created, after all, the neck of the giraffe is indeed too long, and it is easy to evolve the neck into a few centimeters or more than ten centimeters, and it seems a little magical to evolve a few meters, so there is a saying that the gene is destined to do so.

The evolved length of the giraffe's neck is the result of natural selection. The ancestors of giraffes were herbivores that lived on the ground, and because of geological and environmental changes, plants on the surface began to grow upwards, while the ancestors of giraffes could only evolve to grow their necks to obtain food in order to survive.

The long neck of the giraffe is naturally screened out, and the giraffe with a short neck can't eat food so it disappears, and those who stay are all long-necked, natural selection, survival of the fittest.

is the result of natural selection. Giraffes often stretch their necks to reach high enough for plants because of their limited food in their previous environment, so their necks become longer and longer.

Why Do Giraffes Have That Long Necks?

The first impression of a giraffe is its long neck, and the giraffe's name is also derived from its neck, so why does a giraffe's neck grow so long?

Introducing the reasons for giraffes' long necks.

Because giraffes have evolved to stretch their necks to eat food. So over time, the giraffe's neck gets longer and longer.

This is the result of evolution. The food they need to eat is relatively high, and their necks are stretched out.

The reason why the giraffe's neck is so long is that it has to take leaves from very large trees to eat, which requires a special effort to stretch the neck, and a short neck cannot get food.

Why Do Giraffes Have That Long Necks?

Because giraffes feed mainly on leaves, when the leaves on the shorter trees are eaten, they have to work hard to eat the taller leaves, and after a long time, their necks become exceptionally long.

From an evolutionary point of view, it is likely that the food that giraffes need to eat grows on very tall trees, so some giraffes with short necks are eliminated because they can't reach food, and the rest are giraffes with long necks, and over time giraffes have long necks.

According to the principle of natural selection and survival of the fittest, the reason why giraffes' necks are so long is because those short giraffes are naturally selected because they can't eat the leaves on the trees.

Animal World: How did giraffes evolve? Will the neck be eliminated after such a long neck?