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There was the egg, and the egg was a single-celled individual. It can be assumed that in ancient times, a bird should have given birth to a mutated egg in response to changes in the external environment, and this egg hatched and gave birth to what we now call chickens. So I think there are eggs first.
Instead of having a chicken or an egg (eggs and eggs are two different concepts).
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The chicken or the egg.
The chicken-and-egg question is a question that has been debated for a long time and there has been no clear answer. In fact, the appearance of eggs was much earlier than the appearance of chickens, because as early as 280 million years ago in the Permian, reptiles appeared, and reptiles (such as crocodiles, dinosaurs, etc.) would lay eggs, and birds appeared in the Jurassic period 180 million years ago, and chickens appeared even later, but the question about "chicken or egg" is actually asked who comes first and who comes first, chicken or egg.
Chickens lay eggs, eggs hatch chickens, if you say that chickens appear first, then "how can no laying hens hatch"? If you say that the eggs appear first, you will encounter the problem of "who lays the eggs without the chicken", which is really confusing.
According to evolutionary point of view, there is no question of who comes first and who comes after chickens and eggs. As a species in the class of birds, chickens are differentiated from primitive birds, and eggs are the fertilized eggs of chickens (referring to eggs that can breed chicks), and in the long process of the formation of chickens, they have always been a bridge connecting the generations in the evolution of "primitive birds-chickens". In the formation process of chickens, there are three factors:
i.e. variation, heredity, natural selection. "Chickens" lay eggs (they can't be called chickens when they were more primitive), and eggs give birth to "chickens", which are not exactly the same between the two generations, and there are always differences in the offspring born to the same parent. A "chicken" can lay many eggs, but not all of them end up as adult chickens.
In the struggle for survival, individuals with favorable mutations get the best chance to preserve themselves, and the advantages and disadvantages are determined by nature, and chickens are formed precisely because nature gradually retains their good running. Variation characteristics such as more ground activities and poor flight ability, and differentiated from primitive birds. Obviously, heredity plays a role in maintaining and consolidating variation, which accumulates through heredity.
After a long-term, generational process of "chicken" to egg and egg to "chicken", under the action of natural selection, the variation of species is accumulated in a directional manner, resulting in the differentiation of species and the formation of new species, and the "chicken" slowly evolves and the egg also evolves.
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Eggs are said first about chickens and then about eggs, so there are chickens first and then eggs.
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The chicken-and-egg answers are mainly focused on the following two categories:
1. Human beings first have the concept of chickens, and then the concept of eggs. So first there are chickens, then then there are eggs. For example, Aristotle, a well-known academic authority, said:
Eggs hatch birds, but birds can't be born from a primordial egg, otherwise there must be an original bird to lay the egg.
2. There is an egg first, and the chicken that hatches the egg is still the chicken, but the egg laid by the chicken is no longer the egg. All life is connected as one, never ending in continuous change. Therefore, the birth of chickens is in the cycle of eggs from generation to generation.
This is based on Darwin's On the Origin of Species. However, in recent years, many new theories have emerged on this issue.
As for the question of "chicken laying eggs or eggs laying chickens", neither the philosophical or scientific circles have reached a conclusion for the time being. If you have to give the most scientifically rigorous answer, it can only be together. In the grand process of changing from a non-flock to a flock, the individual has long been submerged, and the two cannot be separated.
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Did it come first, the chicken or the egg?
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The correct answer is that there are chickens first. Some scientists have discovered that a protein that can promote eggshells is found in the ovaries of chickens. They believe that this protein, called "OC-17 protein", is involved in the formation of eggs, and after a series of studies, the process of controlling egg formation was discovered, and it was also found that other birds have this element to control.
That is to say, at the very beginning, the native chicken can lay eggs, but this kind of egg can not hatch chicks, but when one of the native chickens hatches a small macro leaky chicken, it also inherits this gene, so by extension, the chickens after that can lay eggs and hatch chicks.
At the beginning of the world, the puzzle of whether it was "the chicken first" or "the egg" was a puzzling old debate, and the chicken and the egg made people always explore the rock and discuss the origin of life and the universe and the nature of the world.
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There were birds in the world, and birds gave birth to chickens (because birds are chickens) and they were viviparous, and finally chickens laid eggs.
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Who is idle and bored, to study whether there is an egg or a chicken.
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I remember that it was proposed by the Greek philosopher Socrates, but it is certain that there is a backstory, and it is stupid to take out the power of a single version.
In the case of chickens vs. eggs, the answer is chickens first; In the case of eggs and chickens, it is the egg first. It should be cognate with the saying "white horses are not horses". Before the concept of chickens, all eggs were not called eggs!
This is understood from idealism, and there must be chickens first. From a materialistic point of view, this egg is a chicken, not an egg or an egg. "The chicken or the egg" is actually a dialectic of idealism and materialism to understand things) My answer is very simple:
If you ask the egg, the egg comes first; If you ask the eggs, the chickens come first, and there is no difficulty. An egg is not equal to an egg, just as we know that a white horse is a horse, but it is not equal to a horse. (For example, if the animal that grows from an egg is not a chicken, then the egg is not called an egg.)
Horses and donkeys give birth to mules, we judge the species from mature individuals, and there are quantitative requirements in itself, otherwise we will only call them mutants) so there are chickens and then eggs, and there are eggs and then chickens, and it's just a word difference.
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It seems to have been written by the Greek philosopher Soucrates.
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First there are chickens and then there are eggs, which are called eggs.
First there are eggs, and then there are chickens, which are called laying hens.
Eggs cannot lay eggs.
Chickens can't give birth.
Eggs can only be laid for chickens.
Chickens can only lay eggs.
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