Is the end result of evolution the creation of new species?

What is the end result of biological evolution? Does a post-biological universe really exist? ]["The Postbiological Universe"What does it mean].

The last to survive, of course, were the human beings.

1. Differences: (1) Different meanings.

1. New speciation has given rise to new species that are different from the previous ones. Its three basic links include mutation and genetic recombination, natural selection, and isolation.

2. Evolution, the change of genetic traits in a population between generations in biology.

b) The signs are different.

1. The hallmark of new speciation is reproductive isolation;

2. The hallmark of biological evolution is the change of gene frequency.

3) The biological relationship is different before and after the change.

1. The new speciation is different from the previous species;

2. Organisms still belong to the same species before and after evolution.

2. Connection: 1. The essence of biological evolution is the change of gene frequency, which can be large or small, and does not necessarily break through the boundaries of species, that is, biological evolution does not necessarily lead to the formation of new species.

2. New speciation indicates that organisms have evolved.

Question 1: What is the result of Darwin's proposal for biological evolution? The evolution and development of organisms under the action of variation, heredity and natural selection, the process of species elimination and species generation. Its main theme is to survive the fittest, and the unfit are eliminated.

Question 2: What is the result of biological evolution as a result of natural selection.

Question 3: What did Darwin think was the result of biological evolution? Natural selection.

Question 4: One of the great biologists who proposed what is the result of biological evolution Biological evolution refers to the evolutionary process of the occurrence and development of all life forms. The word "evolution" is in the Latin word evolution, the original meaning is "", which is generally used to refer to the gradual change and development of things, from one state to another.

In 1762, the Swiss scholar Bonnet was the first to apply the term to biology. Later, Darwin's theory of the origin of species was also born on the basis of this theory.

Question 5: What is the result of Darwin's proposed biological evolution? The evolution and development of organisms under the action of variation, heredity and natural selection, the process of species elimination and species generation. Its main theme is to survive the fittest, and the unfit are eliminated.

Question 6: What is the result of biological evolution as a result of natural selection.

Question 7: One of the great biologists proposed what is the result of biological evolution Biological evolution refers to the evolutionary process of the occurrence and development of all life forms. The word "evolution" is in the Latin word evolution, the original meaning is "", which is generally used to refer to the gradual change and development of things, from one state to another.

In 1762, the Swiss scholar Bonnet was the first to apply the term to biology. Later, Darwin's theory of the origin of species was also born on the basis of this theory.

Question 8: What is the result of the evolution of the living organisms on the earth The living organisms on the earth are the result of the natural evolution of the biosphere.

Sudden changes in external conditions are prone to genetic mutations or chromosomal variations. In order to adapt to the new environment, the favorable genes corresponding to the favorable traits were continuously accumulated, and the individuals with the unfavorable genes were eliminated, resulting in directional changes in the gene frequencies of the population. Any change in gene frequency, regardless of the magnitude of the change, causes a change in traits, is within the realm of evolution.

Speciation refers to the process by which one species develops into another. It must be established when a change in gene frequency breaks through the species boundary to form reproductive isolation. This includes not only prolonged periods of time, more pronounced genotypic and phenotypic changes, but also the presence of reproductive isolation.

Thus reproductive isolation is a necessary condition for speciation, not for biological evolution.

Population is the basic unit of biological evolution, and the essence of biological evolution is the change of gene frequency in population. Mutation and genetic recombination, natural selection and isolation are the three basic links in the speciation process, through which the population diverges and eventually leads to the formation of new species. In this process, mutation and genetic recombination produce the raw materials of biological evolution, natural selection changes the gene frequency of the population and determines the direction of biological evolution, and isolation is a necessary condition for the formation of new species.

4. The shape of the new species should be two necessary to make the high piece one geographically isolated and the other reproductive isolated. These two conditions must be met for the formation of new species, 2, under the change of environment, 0,

In the changes in the natural environment, the fittest survive, and the unfit are eliminated. The core of Darwin's theory of natural selection. The formation of new species is generally through long-term geographical isolation, so that the two populations that originally belonged to a species are isolated from each other and cannot communicate genes, and eventually produce reproductive isolation, once the reproductive isolation occurs, it means the formation of new species.

Analyze it this way.

Let's start with option d, natural selection causes a directional change in gene frequency. Looking at option a, due to the change in the gene frequency of the population, new species must be formed after the evolution of organisms.

Now analyze. Changes in gene frequencies cause genetic variations in organisms, but this variation is uncertain and directionless. In the absence of natural selection, more than 90% of the genetic variation of organisms is fatal, that is, the vast majority of the variation will lead to genetic defects, resulting in the destruction of normal genetic mechanisms, so that this genetic change cannot be inherited, let alone accept natural selection.

Of the remaining less than 10% of the variations, most are neutral, that is, the genetic variations can neither form a new species nor affect the survival of the mutated organisms. For example, the long tail becomes short tail, the black feather becomes gray feather, the green eye becomes the blue eye, and so on, such neutral mutations only increase the diversity of species, but do not lead to evolution, that is, the formation of new species that are more adapted to the environment.

Less than 1% of mutations are positive, allowing species to change more in their environment. This is the basis for the formation of new speciation. It is said that it is the basis, not that a new species will be formed, because this new positive mutation must be heritable, and the mutated new gene can rapidly expand in the original population and occupy a genetic predominance in order for the formation of a new species to be possible.

This requires natural selection. If the ecological environment "recognizes" the genetic change, that is, it is more suitable for the current living environment, then the changed gene can spread in the population and occupy the survival advantage in the environment. Otherwise, new genes, even if they are able to adapt to the current environment, will not spread rapidly in the population, and may even disappear after one or more generations, and new species will not be formed.

This is called "natural selection". Natural selection, on the other hand, necessarily "selects" only for positive mutations in genes. The rest of the mutations are eliminated by natural selection.

Even if it is preserved by natural selection, it is not the formation of a new species. So option d is correct.

Therefore, a change in the gene frequency of a population does not necessarily mean the evolution of the organism. And creaturesIndividualsNor does evolution necessarily lead to the formation of new species. So option A is wrong.

As long as the frequency of a gene changes, it is called evolution.

The formation of new species requires reproductive isolation.

Long-term natural selection can lead to populations in different regions evolving in different directions, leading to reproductive isolation and asking: Are Siberian tigers and South China tigers the same species? There's only geographic separation between them, isn't there?

Obviously, their gene frequencies are different, which means that they are the result of evolution.

After a long period of evolution, the same organisms are reproductively isolated from each other, and the biological characteristics and genes are very different, then the two organisms become two different organisms, and the species is formed.

Speciation leads to biological evolution.