What was the content of Darwin s theory of natural selection?

What is the content of Darwin's doctrine of natural selection.

Natural selection of the fittest to survive.

1. Overbreeding - the conditions for the survival of living organisms.

2. The struggle for survival - the means of survival of living beings.

3. Genetic variation - the basis and internal causes of biological survival.

4. Survival of the fittest - the result of biological survival.

Darwin's theory of natural selection, the main content of which is fourfold:

1: Overbreeding.

2: Survival competition.

3: Heredity and variation.

4: Survival of the fittest.

Overbreeding, struggle for survival, genetic variation, survival of the fittest.

Darwin's theory of natural selection has four main points: overbreeding, survival struggle (also called survival competition), heredity and variation, and survival of the fittest. Darwin's theory of evolution explains biological evolution and the kinship between different species from the macroscopic phenotype, that is, from the similarities and differences in the morphology, structure, physiological function, and behavior of organisms, and relatively successfully explains the adaptability and diversity of organisms. The nature of genetic variation cannot be explained.

In the middle of the 19th century, Dahlier established his own scientific theory of evolution, materialistically elucidated the mechanism of biological evolution, and the main DAO content of his theory of self-selection included overbreeding, competition for survival, genetic variation, and survival of the fittest. With the development of modern biological sciences such as genetics and ecology and the in-depth study of biological evolution theory, Darwin's theory of evolution has been continuously improved and developed, forming a modern biological evolution theory based on the theory of natural selection.

The main contents of Darwin's theory of natural selection are: overbreeding, survival struggle, genetic variation, and survival of the fittest.

1.Excessive reproduction (external causes): All kinds of organisms generally have a strong ability to reproduce.

2.Survival Struggle: Organisms rely on limited food and space, and every organism must fight for survival.

3.Heredity and variation (intrinsic causes): In nature, biological individuals have hereditary and variable characteristics4

Survival of the fittest (outcome): In the struggle for survival, individuals with favorable variation are more likely to win and survive in the struggle for survival; Conversely, individuals with unfavorable mutations are prone to death due to defeat in the struggle for survival.

The proof passage of natural selection is summarized as follows:

The first paragraph: Presenting the argument that natural selection plays a role in the variation of organisms under natural conditions.

The second paragraph: Engage in theoretical inferences about the rationality of natural selection and the survival of the fittest.

Paragraph 3: Species originally existed in the form of variants, which can explain biological phenomena such as many species in the same genus flourishing and having a large number of variants, while creationism cannot explain it.

Paragraph 4: Natural selection can explain biological phenomena such as the evolution, improvement, extinction of organisms, and the ability to plan taxa of different sizes, while creationism cannot.

The most unacceptable part of Darwin's theory of natural selection is its inevitability. The conditions of natural selection are very specific, but once these conditions are met, they inevitably occur. Natural selection should perhaps not be called a law of biology, and the reason why it occurs is not biology but probability.

To fully explain the origin of life, the tendency to complexity, and the emergence of intelligence, a rich science of digital limbs is needed, and natural selection alone is not enough. In addition to natural selection, it must have more means. Post-Darwinists have demonstrated that there is no single evolution propelled by natural selection in one dimension, and that evolution should have both width and depth.

The Doctrine of Natural Selection:

Darwin's theory of natural selection is the core content of biological evolution, and the central thesis of natural selection is that species are mutable. Moreover, living things are diverse and adaptable, and the main content of the doctrine of natural selection is:

Overbreeding, Struggle for Survival, Heredity and Variation, Survival of the Fittest.

Darwin found that all kinds of organisms on the earth generally have a strong ability to reproduce, and have a tendency to grow according to geometric ratios, according to theoretical calculations, even animals and plants that do not reproduce very quickly will also produce a large number of offspring in a short period of time and occupy the entire earth.

The ability of living things to reproduce is so strong, but in fact, very few of the offspring of each creature survive, and Darwin believed that this was mainly due to the struggle for survival caused by overbreeding.

Any kind of organism must struggle for survival in the process of life, including the struggle between organisms and the inorganic environment, the struggle within the species, such as the struggle for food, mates and habitats, and the struggle between species.

Darwin's theory of natural selection has four main points: overbreeding, the struggle for survival (also called survival competition), heredity and variation, and survival of the fittest.

Overreproduction Darwin found that all kinds of organisms on the earth generally have a strong reproductive ability, and all have a tendency to grow according to geometric proportions. The elephant is a very slow animal to reproduce, but if each female gives birth to six litters in her lifetime (30 to 90 years old), each of which lives to be 100 years old, and is able to reproduce, then after 750 years, the number of offspring of an object can reach 19 million. Therefore, according to theoretical calculations, even animals and plants that do not reproduce very quickly will produce a large number of offspring and occupy the entire earth in the early period of Sun San.

But in fact, for tens of thousands of years, the number of elephants has never increased to that much, and the reproductive ability of many creatures in the self-excavation realm far exceeds the reproductive capacity of elephants, but the number of various organisms has maintained a relatively stable state for a certain period of time. Darwin thus thought of the struggle for survival.

The main contents of Darwin's theory of natural selection are overbreeding, struggle for survival, heredity and variation, and survival of the fittest.

From the perspective of the interaction between organisms and the environment, Darwin believed that biological variation, heredity and natural selection can lead to adaptive changes in organisms. Natural selection has stood the test of time because it is based on sufficient scientific facts, and has had a profound impact on the academic community for more than 100 years.

Darwin discovered that all kinds of organisms on the earth generally have a strong ability to reproduce, and all have a tendency to grow in geometric proportions. According to theoretical calculations, even animals and plants that do not reproduce quickly will produce a large number of offspring and occupy the entire earth in a short period of time.

Darwin introduced

Charles Robert Darwin, an English biologist and the founder of evolution. He once sailed around the world on the ship Beagle for five years, and made extensive observations and collections of flora, fauna, and geological structures. He published The Origin of Species, which put forward the theory of biological evolution, thus destroying all kinds of idealistic creationism and the immutability of species.

In addition to biology, his theories have had a significant impact on the development of anthropology, psychology, and philosophy. Engels listed the theory of evolution as one of the three major discoveries of natural science in the 19th century (the other two being the cell theory and the law of conservation and transformation of energy), which made outstanding contributions to mankind. On 19 April 1882, Darwin died at the age of 73 at Darwin House, where he was buried in Westminster Abbey.