Questions about Darwin s theory of biological evolution

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.

This is Darwin's natural selection, and the situation of the mole fits perfectly, without contradiction.

The so-called "advantageous" of favorable variation is relative, not absolute, and what is advantageous in one environment may become "unfavorable" in another.

It should be natural selection, in layman's terms, it is to use in and out, and it takes a lot of energy to see things, so don't use this part of the energy without looking.

Tell the landlord that there is no way, that is the "standard answer" in the book. (But what is in the book is not necessarily correct).

It may be explained that a certain generation of moles mutated and lost their vision, but because the moles live underground, it is almost the same whether they have vision or not, so it is ......

And upstairs, using in and out of waste is not natural selection.

If the eyes have no effect on survival, then the eyes become dispensable, and with each generation, the eyes may become good and bad, and in the end the eyes of the mole may be half good and half bad. But the more likely eye is more likely to get bad, because it's easier to produce bad mutations, so the eye ends up being bad.

If you go to the post bar of evolution, you will find the answer.

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.

The core idea of Darwin's theory of biological evolution: natural selection, survival of the fittest.

In the theory of biological evolution, it means that every organism will have genetic mutations when it reproduces the next generation. If this variation is conducive to the better life of the creature, then this favorable variation will be retained in the form of "survival of the fittest" through the selection of the environment.

Competitors, competition for self-existence. The chosen ones are also suitable for their species. It means that people and things live side by side in the world, and eat the benefits of nature together.

However, it is connected to the people's things, and each has its own contention. At the beginning, the number of species is only to fight with the species, the weak are often the strong meat, and the foolish are often the wise. And it has to survive and leave the seeds, it will be strong to endure the Kuijie, vigorous and clever, and with its time and time of the time and the most suitable for the people.

The theory of evolution tells us that this is the proof of evolution: special environments force these creatures to mutate into special skills that can adapt to harsh environments, and those that can't adapt to harsh environments are eliminated, but the key is whether these instincts are new or inherently potential?

Does the biological world show us that they compete with each other, as evolution suggests, or do they help each other? In fact, a simple example is the respiration of animals and plants. The animal potato is inhaled in oxygen and exhaled carbon dioxide; Plants inhale carbon dioxide and exhale oxygen, helping each other.

Coopetition and cracking

Darwin's theory of evolution argues that the most competitive places are also the fastest evolving places, and there are very similar arguments about the decisive factors of global competition - globalization, entry barriers, industry consolidation, and the advantages of chain management.

In the era of networked economy, we can bring more enlightenment than the natural world. The term "co-opetition" is often used to describe strategies that create value by partnering with competitors, and are more common in sectors such as telecommunications and healthcare. This concept of "coopetition" is also derived from the behavior patterns of nature.

Darwin proposed that biological evolution was the result of natural selection.

Darwin called the process of survival of the fittest and elimination of the unfit in the struggle for survival natural selection. Runa.

According to Darwin, the process of natural selection is a long-term, slow, continuous process.

From the point of view 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 is based on sufficient scientific facts, can stand the test of time, and has not had a profound impact in the academic community for more than 100 years.

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.

Darwin's theory of evolution was controversial? Did humans really evolve from ape-man?

The Theory of Evolution is arguably one of the most absurd theories in the history of human civilization, and one of the greatest pseudosciences. It leads humanity from wisdom to ignorance. It is a shame that human society can accept the theory of evolution and think that man was transformed from apes.

Science is a process that is based on a laboratory and can be replicated repeatedly. And what cannot be made and repeated in the laboratory cannot be called science. The evolution of life from water to land, from tree to tree, from crawling to walking upright, has no scientific proof, only some far-fetched explanations, and these far-fetched explanations are entirely based on their personal conjectures.

Darwin proposed that biological evolution was the result of natural selection.

In the struggle for survival, the gradual accumulation of adaptive variation will develop into significant variation that leads to the formation of new species. Because "natural selection can only work by accumulating slight, continuous, beneficial variations, it cannot produce large or sudden changes, it can only work in short and slow steps".

Modern evolutionary theory adheres to Darwin's idea of gradual change and the creative role of natural selection, emphasizing that evolution is the genetic change of a group over a long period of time, and believes that through mutation (genetic mutation and chromosomal aberration) or genetic recombination, selection, drift, migration and isolation, the genomic achievement of the whole group will change, resulting in reproductive isolation and evolution into different species.

Since the 70s of the 20th century, some paleontologists have proposed the theory of punctuated equilibrium based on the evolutionary gaps shown in the fossil record, instead of the traditional progressive view. They believe that species are in a state of static equilibrium with little change for a long time, and that for some reason this equilibrium is suddenly interrupted and quickly becomes a new species in a short period of time.

Natural selection.

Darwin's theory of biological evolution is the result of natural selection.

Natural selection: Genetic and variation are prevalent in nature. For biological species, individuals with favorable variations are likely to win the struggle for survival and reproduce offspring, while individuals with unfavorable variations are prone to be eliminated (survival of the fittest, elimination of the unfit).

Biological evolution is the result of natural selection.

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

For example, the giraffe gave birth to 5 children, some of whom had long necks and some with short necks, the long ones could eat leaves, and the short ones starved to death. The neck is long, and the gene is passed on to the next generation.

Natural selection, survival of the fittest, elimination of the unsuitable.

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.

Genetic variation provides raw materials, and natural selection determines the direction of evolution.

Darwin discovered evolution, Columbus discovered America, and some people kept asking me why I should go out and see it.

It's a long story, in a nutshell.

Prerequisites:

1) Be observant and diligent in taking notes;

2) Be good at thinking;

3) perseverance;

4) Dare to break through the inherent mindset;

5) Love and strong interest in nature.

And so on and so forth.