-
The core idea of Darwin's theory of evolution is to eliminate some organisms that are not suitable for living in the new environment as the environment changes. I think there is some truth in Darwin's point of view, that if you can't adapt to the new environment, there is no way for living things to survive. Therefore, we must know how to change ourselves in life and adapt to some new environments.
-
Natural selection is at the heart of Darwin's theory of evolution. The Chinese explanation is that living things compete with each other, and those who can adapt to life are chosen to survive. In the theory of biological evolution, it means that every organism will have genetic mutations when it reproduces the next generation.
This kind of law is just like the survival of the fittest, which is very normal.
-
Natural selection, such a statement is very correct, organisms will compete with each other, sometimes interdependence, as long as organisms can continue to evolve can have an advantage.
-
1. Darwin's theory of biological evolution: natural selection, survival of the fittest.
2. Significance: Darwin's theory of evolution is a "great synthesis" of biological science, which marks the complete formation of the idea of biological evolution. Since then, biological science has entered a new historical period.
It was the most scientific and complete theory of evolution under the historical conditions of that time, and it was the main theoretical basis of modern evolutionary theory. It was on his theory that the theory of genetics was added, and the theory of evolution in modern science was established. Creationism and species immutability have been dealt an unprecedented blow.
-
Main idea: Darwin believed that there is a struggle for survival between living things, and that the adaptors survive and the unfit are eliminated, which is natural selection. It is through heredity, mutation, and natural selection that living things evolve and develop from low to high, from simple to complex, and from few to many.
1. Evolutionary theory: species are changeable, existing species are changed from other species, and one species can become a new species. This has long been confirmed by observations and experiments in biogeography, comparative anatomy, comparative embryology, paleontology and molecular biology, and the emergence of new species can be directly observed in the laboratory and in the wild.
So, this is a scientific fact that is as reliable as "the earth is round" and "matter is made up of atoms". Today, with the exception of a few who ignore the facts because of religious fanaticism, there are practically no biologists who deny the fact of biological evolution.
2. The doctrine of common ancestor: All living things come from a common ancestor. Molecular biology discovered that all living things use the same set of genetic code, and biochemistry revealed a high degree of consistency at the molecular level, which ultimately confirmed Darwin's vision.
So, this is also a generally accepted scientific fact.
3. The Doctrine of Natural Selection: Natural selection is the main mechanism of evolution. The existence of natural selection has been confirmed by countless observations and experiments, which is also a scientific fact.
The above three points, that is, we often hear about "natural selection, survival of the fittest", the birth of modern genetics, for which provides important evidence, in fact, natural selection, competition is "genes".
Due to limited living space, resources, etc. Overbreeding inevitably leads to a struggle for survival. In the process of life, biological individuals will mutate.
In the struggle for survival, individuals who have favorable variation and can pass on the favorable variation to the next generation are more likely to win the struggle for survival and survive and reproduce.
On the other hand, individuals with unfavorable mutations are prone to defeat and die in the struggle for survival. That is to say, all the organisms that survive are adapted to the environment, while the organisms that are eliminated are not adapted to the environment, that is, "survival of the fittest".
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. >>>More
The steamer is right.
Moles live underground for a long time, the function of vision is not important, more to use hearing, touch, smell, therefore, hearing and touch and other developed, there will be more chance of survival, at the same time, due to the imbalance of development, in one place is strong, in another performance may be relatively weak, in the auditory performance is strong, but the visual performance may be worse. Therefore, when the generations are continuously screened by nature, the vast majority of those left behind are those with strong auditory, tactile, and olfactory abilities and relatively weak eyesight. >>>More
It's simple, 16 words:
Overbreeding (which is the basis of evolution). >>>More
In 1837, Darwin used a hypothetical tree to sketch the evolution of species for the first time. This concept soon became a hallmark of the theory of evolution by natural selection. But scientists now say Darwin's signature "evolutionary tree of life" showing the relationship of species in evolutionary history is wrong and needs to be replaced by a new theory. >>>More
The intersection of evolutionary psychology, biobehavior, and sociology is also used to describe some social behavior issues. For a specific cultural problem (including economic and political issues), because there is no semi-reserved replication inheritance like genes in culture, and variation is relative to heredity, there is no real heredity, and there is no variation, all purely cultural problems cannot be compared to genetic problems and apply the theory of evolution, but some purely cultural problems can affect evolution as natural selection pressures, not only for human beings, but also in any socialized individual organisms, such as sexual selection pressure. Racism and nationalism often want to "get along" with the theory of evolution, but the genetic differences within most races and ethnicities are greater than the genetic differences between different races and ethnicities, so racial and ethnic issues are also cultural issues rather than genetic issues.