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Human evolution originated from forest apes, and developed step by step from primates through a long evolutionary process. It has gone through four stages: ape man, primitive man, sapiens man, and modern man. Due to the development of archaeology, prehistoric civilization has been gradually denied, and archaeology has most of the evolved hominin fossils.
In line with the discoveries of modern biology, it has been discovered that genetic DNA is evolutionary, confirming the truth of the theory of neutral evolution, so how do humans maintain their huge numbers?
In the process of evolution, how did human beings ensure that their own population remained in a large number?
1. Human beings are a group that likes to be lively
Regardless of men, women and children, we all like to join in the fun and like to watch the fun. Because as long as it's interesting, when you're out of the way, you're going to be extra relaxed, and you can point out by looking at others. That's why there are so many trolls on the Internet, and in reality, only you know if your life is good or not.
2. Human beings are social creatures
Social animals refer to animals that take the group as a way of life, and take care of each other and assist each other in eating, sleeping, migrating and other behaviors in life. In prehistory, human beings hunted collectively, and later there were clans and settlements, and now we still have cities, and we have friends and family.
3. Human beings have gone from relying on the food chain to becoming the top of the food chain
The food chain is essentially a constraint and feedback mechanism for nutrient flow. It determines how energy from the sun (our biosphere, excluding the hydrothermal biosphere) circulates throughout the biosphere under natural conditions. Humans have developed animal husbandry and farming-based agriculture that has completely broken the food chain.
In other words, human beings are at the top of the food chain, and the exact position of human beings is to stand outside the food chain. The flow of human nutrients is exclusive and independent of the food chain.
Postscript: As long as our genes exist, the pace of human evolution will continue without stopping. But evolution is a long process of accumulation, and it is too difficult to detect compared to the number of years we live as individuals.
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I think that in the process of human evolution, in order to ensure that their race lives in a very large number of places, they paid a lot of attention to reflection and the transmission of knowledge, so it took thousands of years for humans to develop to the current size.
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In the process of evolution, they will reproduce to keep their population large.
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This is due to the fact that human beings are constantly reproducing, and they are also constantly communicating and developing between races, so that the huge race can appear.
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Answer: a
The fundamental purpose of human behavior is to adapt to the environment, maintain the reproduction of individuals and races, and constantly change their own survival and living environment while adapting to the environment.
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Hello landlord. Humans evolved from the ancient creature, Australopithecus forest, a population that is currently presumed to have originated in Africa. Later, due to natural disasters and other reasons, the living environment of some apes was destroyed, while others did not; The broken apes began to learn to use fire, make tools, and gradually began to walk upright, slowly evolving into a variety of humans, and now our Homo sapiens species is among them; The other part of the apes, whose living environment has not been damaged, have slowly evolved into the current orangutans.
Is there only one kind of human being, Homo sapiens? That's because the races kill each other for the living environment, food resources, etc., and the final victor is Homo sapiens, whose distribution occupies almost the entire earth, and other kinds of human beings are extinct, but it is still not completely denied whether there are other human races in the world (here to add: whether it is white or yellow, black people belong to the homo sapiens race).
Recommend the landlord to see the encyclopedia"Anthropogenus"Entry.
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Dude, look closely and you'll find out. The physiology of the sparrow is unable to support the complex productive labor that was a key factor in our evolution. The same goes for other brutes.
The main organ of labor is the hand, that is to say, to free the forelimbs from the task of defying gravity to labor. Primates have a unique advantage in making things simpler. The use of the hand develops the brain, which gives rise to the division of labor, which evolves into sociality.
The real formation of society is also the use of fire and other tools, and no animal can use fire with the same peace of mind as we do. And these tools have accelerated the deepening of the social division of labor. Thus increasing productivity and generating surplus labor value.
Then the desire to dominate the product of excess labor led us through slave society, feudal society, and so on. Other species do not seem to produce much surplus labor value, and their productivity is too weak, and perhaps they should not be called productivity. Therefore, sociality is a special term for higher wisdom.
When we talk about animal sociality in general, we refer to an instinct that arises in evolution. And our close relatives apes, scientists are also very struggling with how to define them. Then there is language, which evolves through labor, but it also has material conditions.
You can find that we can produce a lot of sound that other species can't match, and this is due to our vocal system. Why is my vocal system different from other species? Because we walk upright, we change the aerodynamic layout of the respiratory system, and the cerebellum is better at controlling the tongue.
So far, we have not found a similar animal on Earth that walks with alternating two hind limbs. The premise of walking upright is the forelimbs that are liberated from labor, which is a good virtuous circle.
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All species are evolving, but in different directions and at different speeds, and there is a big difference between the fossilized bones of animals in prehistoric times and those of today's animals. Today's birds (including the sparrows you see) evolved from a branch of dinosaurs, and if they hadn't evolved, they would have died out long ago, and you don't see any birds now.
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The lower the animal, the less factors the environment influences him, the more adaptable it is to the environment, the number of reproduction and the difficulty of survival, the greater the difficulty of survival, the more it is necessary to breed more offspring to maintain the continuation of the population. Gradually, as the population adapts to its environment, a large number of surplus individuals are produced, and through natural selection, many individuals who are not suitable for the new environment are gradually eliminated, and the lower end of the food chain is overconsumed. The size of the population will shrink dramatically.
Eventually a balance is reached.
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In fact, the evolution and development of the entire biological world is largely accidental.
The creature of man appeared on this earth by chance, and that's it.
Just as the appearance of electrons is random and probability, the genetic mutation of living things is also random, but under the competitive pressure of nature, some mutations remain, and some disappear. Survival of the fittest.
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The brain capacity is different, the ability to process information varies greatly, and the brain is not as big as the jujube kernel, and the degree of evolution is limited.
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Who knows the amount needed for human evolution, to ensure the healthy evolution of human beings.
The fundamental cause of evolution is the mutation of genes in the human body, and the quality of the individual produced by the mutation is entirely a matter of probability, and there is no such thing as healthy evolution as you say. For example, is it healthy for a giraffe to mutate and produce an individual with a short neck? The so-called evolution is to mutate to produce a variety of individuals, and then let natural selection in the natural environment produce individuals who are more suitable for the environment, and those that are not suitable will be eliminated, that is, the individual will die, so that the unfavorable mutant genes will not be inherited, and the favorable mutated genes will be inherited.
The above are the basic principles of evolution. All individuals in human society are preserved, that is, genes that are conducive to adaptation to nature or those that are not conducive to adaptation to nature will be passed on to future generations. Because evolution is a combination of natural selection and genetic mutation, without natural selection, evolution will stagnate or produce all kinds of disasters.
One of the reasons why there are many more diseases now than in the past is this, because in ancient times, some people had a strong immune system to resist diseases, and some people had a weak immune system and died. Modern people can survive regardless of whether they are strong or weak, so diseases are rampant now.
Uh....There is a level of your question, with all due respect, I can't do anything about it....It is estimated that ecological experts will have a headache when they see this question....Because there are too many probabilities involved in this question, who knows which mutation will be in the DNA sequence of so many people? How can you be sure that the mutated gene must be genetic? At present, the human gene pool has not yet been established, and the specific number of human genes has yet to be studied, and it is impossible to calculate this probability.
That's all I can tell you, I'm sorry.
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Answer]: The fundamental purpose of human skin behavior is to adapt to the environment and maintain the reproduction of the individual and the race. Chi Qing grasped the choice A.
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