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Anonymous users2024-02-11Six million years ago, a female ape gave birth to two daughters, one of whom became the ancestor of all chimpanzees and the other as the grandmother of all humans – A Brief History of Mankind
We don't need to criticize the above statement, although it is not very accurate, but it is very vivid. Among the extant species, chimpanzees are the closest related to humans, and they were not separated from each other 6 million years ago, and genetic similarity can be achieved. In addition, there are gorillas and chimpanzees, which include humans are animals under the family Homo - the subfamily Homo, and modern humans are the only members of the subfamily Homo - Homo sapiens.
Historically, the human family has also been noisy, with about 15 species including Homo sapiens.
However, with the development and evolution, ancient humans have twice gone out of East Africa, because of changes in the natural environment and the global expansion of Homo sapiens, in short, there is only one species left under the genus Homo sapiens - Homo sapiens. With the development of modern genetic technology, the determination of human genes has found that modern humans except Africa have 1%-4% Neanderthal genes, and scientific conjectures believe that Neanderthal genes have a certain negative impact on the immune system and metabolic function of modern humans.
The theory of evolution believes that all species originated from the first simple single-celled life on the earth, and it took about 3.8 billion years to reach the prosperity we see, but in fact, more than 3 billion years were spent on "accumulation of quantity", and it was not until 3.5 billion years ago that a large number of species began to appear, and life began to develop from the ocean to the land. There are currently 1.8 million known species on Earth, and scientists estimate that there are at least twice as many species that have not been discovered.
The object of evolution of living things is not a separate individual, so the first sentence of this article is flawed. The object of the theory of evolution is a population, the mutation and mutation of genes occur randomly and are not directional, when this genetic variation accumulates to a certain extent, new species may appear under the selection of different environments, and the sign of the emergence of new species is the occurrence of reproductive isolation, and the emergence of new species has a more important premise that the emergence of geographical isolation leads to the difference in living environment.
Australopithecus was divided into two regions because of the emergence of the Great Rift Valley, modern humans can be traced back to 15 million years ago forest Australopithecus, more than 2 million years ago Australopithecus australopithecus, until more than 200,000 years ago Homo sapiens, until we go to heaven and earth today. With evolution, groups of individuals are changing in unison, rather than individual individuals developing modern humans. So, in a sense, there is no such thing as a single grandmother.
And on the path of evolution, the boundaries are not so clear, so there is no such thing as a first man or a first woman!
Wen Duruo, **** network invasion and deletion.
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Anonymous users2024-02-10It is actually difficult to distinguish whether the first human being is a man or a woman, because some people think that the real human beings appeared more than 2 million years ago, some people think that it can be traced back to more than 4 million years ago, and some people can trace it back to at least 6 million years ago, so this statement is too general, but most people agree that the earliest human beings were matriarchal societies when there was no developed civilization now, that is to say, the earliest appeared women.
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Anonymous users2024-02-09Personally, I think that the first human to appear should be a woman, but this statement has not been confirmed by scientists, and it is not accurate to say whether it is a man or a woman.
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Anonymous users2024-02-08In fact, it is difficult to distinguish, because the evolution of organisms is a group, not an individual, so whether it is a woman or a man, it is changing with the unity of the individual who evolves into a group, so this statement is more general, and it is not a man or a woman.
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Anonymous users2024-02-07Men of course! There are two words to prove it, and that is "sir" thank you for adopting.
Legend has it that Dayu's right-hand man PLO accidentally discovered that crab was a delicacy when he was removing pests, and it has spread since then.
<> God created man, and he was both male and female, as the Bible says. >>>More
Argon was prepared by Henry Cavendish in 1785, but it was not discovered that it was a new element. It was not until 1894 that John William Strass and the Scottish chemist William Ramsay experimentally determined that argon was a new element.
Isn't it a road of people walking together will be happy, I believe the landlord will not not understand. Like two parallel lines, even if there is a chance to intersect, the ending is still separate.
Why do people smoke and who invented it?Uh, tobacco, there is a certain status in the history of that world, uh, the earliest tobacco he used to treat people's diseases, uh, and then the role of Chen Ying of oil smoke Uh, many people gradually smoked and became addicted to cigarettes.