？？The main principles of Darwin s theory of biological evolution

Charles Darwin was an outstanding British biologist, and the two major theories he proposed for the theory of biological evolution were the theory of artificial selection and the theory of natural selection. 1. The theory of artificial selection: He believes that many of today's domestic animals and cultivated plants originated from wild taxa.

Under the planned selection of people, they gradually accumulate and enhance the variation that is beneficial to human beings, which is actually a process of survival of the fittest. There are three elements to this doctrine: first, there is variation; The second is that this variation can be inherited; The third is that humans can choose mutation.

All three are indispensable.

2. The theory of natural selection: First, Darwin believed that there is universal variation in living things. All living things have mutated properties, and no two creatures in the world are exactly the same.

Variation can be divided into two types: certain variation and not necessarily variation. The so-called certain variation refers to the fact that the descendants of the same ancestor may produce similar variations under the same conditions. For example, the cold and heat of the climate and the thickness of the fur, the abundance of food and the size of the individual.

Adventitious variation refers to different variations from different individuals with the same or similar parents under the same or similar conditions. Lambs born of a white ewe may be white, black, or other colors. At the same time, Darwin believed that organisms generally have a high rate of reproduction and the ability to compete from the bottom up.

Organisms have a tendency to overreproduce, but due to food and space constraints and other factors, only a few individuals of each organism are able to develop and reproduce. Darwin also believed that in the competition for survival, the mutated individuals who are beneficial to survival are retained, and the mutated individuals who are unfavorable to survival are eliminated, which is natural selection or survival of the fittest.

Adaptation is the result of natural selection. In the process of natural selection, only the fittest can survive, but adaptation is only relative to survival, once the living environment changes, the original adaptation may become unadaptable. Finally, Darwin argued:

New species are formed through natural selection.

Darwin is well known to us as the founder of the theory of evolution. The theory of evolution is mainly a scientific proof of the origin and development of species, in fact, in a long time, many scientists have put forward many different views, such as the creationism proposed by the West in the Middle Ages, they believed that the entire natural world was created by God; Even in ancient Greece, it was believed that man evolved from fish.

In the early 19th century, the German scientist Lamarck proposed Lamarckism, which is also the predecessor of the theory of evolution, but Lamarck was not very famous at that time, and his theory was not agreed with by many people, Lamarck's main idea is: different organisms are exhausted and wasted, organisms will continue to evolve from low to high levels, and the environment will affect the habits and physiological state of organisms.

In 1859, Darwin, published the origin of species, in the book elaborated his two views, first: species are changeable, organisms are evolved, second: natural selection is the driving force of biological evolution, once this book was published, it was approved by a large part of the scientific community at that time, and the theory of evolution is also very clear, because every species in the world has the right to live, and in order to survive, it is necessary to survive the fittest, those who are more able to adapt to the environment, Species that evolve according to their environment are naturally more entitled to survive.

Do you know how humans evolved? About 2 million years ago, humanoids appeared in Africa, and then humans gradually came out of Africa and evolved many different human races, they appeared and disappeared, but there are always different human races living on the earth at the same time.

The most primitive primates appeared 8 million to 6 million years ago, the earliest appeared in gorillas, and then, chimpanzees and humans began to diverge into two different stages of human species, humans began to walk upright, and chimpanzees and gorillas still have some common characteristics, as humans out of the forest completely parted ways with orangutans, completed a new evolution.

Natural selection, survival of the fittest; Fittest. Humans evolved because there are many fossil sources that prove that humans evolved from apes.

Darwin's theory of evolution included overbreeding, the struggle for survival, genetic variation, and survival of the fittest, and he believed that all living things evolved.

Darwin's theory is of great significance in the discipline of biology.

1. It is an important theoretical breakthrough in itself. With the help of naturalists, geologists, and theologians at the time, Darwin was able to complete this breakthrough as early as possible. At that time, many people were studying the characteristics of living things, and these research processes led to some correct grasp of biological laws.

The discovery of fossils in geology, the estimation of ancient time and the knowledge of the ice age greatly increased the material available to Darwin. Under a series of impetus, he introduced the theory of biological evolution in the 19th century, when creationism was predominant. There has been a qualitative breakthrough in the concept of biology that has existed for a long time.

2. The theory has a fundamental and founding position in the field of biology. This theory founded modern biology and greatly influenced sub-disciplines such as geology and genetics. In other words, modern biology is basically the inheritance and development of this theory.

This kind of foundational doctrine was undoubtedly of great significance in an era when theology was pervasive and individuals had to bear a great deal of spiritual pressure.

No, for example, cows are the most extinct creatures according to evolutionary theory, but they are still alive and well because of human needs.

No, of course, there are other theories, but other theories have not been recognized, and the controversy is still relatively large.

This is unrealistic, and there are many animals that cannot be solved by biological evolution, although there are other theories such as those who believe that extraterrestrial civilizations are the cause.

1.To put it simply, from 1831 to 1836, as a naturalist, he participated in the round-the-world voyage sent by the British and conducted scientific expeditions for five years. A great deal of observation and collection was made in the flora, fauna and geology, and after synthesis, the concept of biological evolution was formed.

2.Darwin's theory of evolution, with natural selection as the core, for the first time made a materialistic and regular explanation for the occurrence and development of the entire biological world, overthrew the dominance of idealistic metaphysics such as creationism in biology, and brought about a revolutionary change in biology.

To put it simply, it is a piece of evidence of materialism, another theory of the origin and evolution of species.

3.After the Renaissance and the Enlightenment, the rational thinking of modern science was established. Darwin's era was in the mid-to-late nineteenth century, which was the previous stage of coming out of Monty and advocating science, which provided the ideological basis for Darwin to establish the theory of evolution by natural selection in terms of thought and reason. The travels of his youth accumulated a lot of evidence for him, which led him to think about the evolution of species and finally formed a complete system.

It is believed that the environment has a direct impact on the living habits and even the appearance of the species. Leaving the specificity of the species entirely up to God and turning to explaining the species in terms of environmental influences!

There are many theories about the origin of human beings, and legend has it that Nuwa created man, and scientific observation is actually that apes evolvedThe most famous of these is Darwin's theory of biological evolution, which initially thought that the primitive ancestors of human beings were monkeys, but in fact they were not, apes.

First of all, we need to know this Darwinian theory of biological evolution, which actually means that any organism will choose a new way of survival under the change of environment, so that it can evolve itselfFor example, some fish in the ocean have no light due to long-term life on the bottom of the sea, so that their eyes are degenerated and their sense of smell is extremely sensitive, and Darwin believed that monkeys were actually the ancestors of human beings, and this statement was not discovered at that time, and all scientists and biologists were laughing at him, and even ridiculed him as a descendant of monkeys.

But the truth is always subject to the test of history, and later we discovered the existence of genes, and then found that monkeys and humans actually have a lot of similarities, such as walking on both feet, moving with both hands, and the brain is also a relatively intelligent existence in biology, and even many behaviors are very similar to usToday's zoo monkeys even open human school bags to find food, etc., which led scientists to believe in Darwin's theory of biological evolution.

In the end, it was discovered that the ancestors of human beings were not monkeys, but apes that were very similar to monkeysThe environment at that time had changed a lot, so that the genes of apes evolved to adapt to the new environmentThis evolution is a very long process, and the genes of evolution must be preserved in the race, which is also in line with the most important point of Darwin's theory of biological evolution, that the evolution of organisms is not determined by itself but by the environment; To put it simply, any organism that wants to survive in a new environment must adapt to this new environment, change their original lifestyle, genes, etc., and eventually evolve.

Are underwater people real? Darwin's theory of evolution has been questioned, but did humans come from?

The origins of humanity have been controversial in the academic world. One of the popular theories is that humans originated in Africa.

Some people say that human beings originated from the ocean, because many years ago there was only water and no land on the earth, and there were many kinds of creatures in the sea, and then the land appeared, and some creatures abandoned the sea and went ashore, and slowly evolved into the current human beings.

Darwin's theory of biological evolution is the truth, and according to the experiments of scientists, the current state of human beings is the result of the continuous evolution of orangutans.

More than 12 million years ago, forest apes lived in Asia, Africa, Europe and other regions. Later, due to changes in the environment and natural selection, forest apes developed in two directions, one part became great apes, and some became humans.

The origin of human beings is only a hypothesis, and the experiments of scientists have not been successful. There is no real-world evidence for this hypothesis.

Darwin's theory of evolution was wrong, it was just his idea, and there was no basis for it.

Evolutionary pseudoscience, human beings have no origin, they already exist.