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Geological chronology. Cenozoic - Quaternary - Holocene - 10,000 years ago Cenozoic - Quaternary - Pleistocene - 2.5 million years ago.
The Cenozoic Era - Tertiary - Pliocene - 12 million years ago.
The Cenozoic Era - Tertiary - Miocene - 25 million years ago.
The Cenozoic Era - Tertiary - Oligocene - 40 million years ago.
The Cenozoic Era - Tertiary - Eocene - 60 million years ago.
Cenozoic - Tertiary - Paleocene - 67 million years ago.
Mesozoic Era - Cretaceous - 100 million years ago.
Mesozoic Era - Jurassic - 100 million years ago.
Mesozoic Era - Triassic - 100 million years ago.
Paleozoic - Permian - 100 million years ago.
Paleozoic Era - Carboniferous - 100 million years ago.
Paleozoic - Devonian - 100 million years ago.
Paleozoic - Silurian - 100 million years ago.
Paleozoic - Ordovician - 100 million years ago.
Paleozoic - Cambrian - 100 million years ago.
Proterozoic - Aurora - 100 million years ago.
Archean is 5 billion years old.
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Man has his ancestors, and apes have apes and his ancestors.
The creatures of the past no longer exist, and the ancients did not name them. Evolution is not a mutation, it is a long continuous phase.
All living things evolved from protein molecules.
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The purpose of cloning is to update.
The result is a return to antiquity.
Cell Says.
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The theory of evolution lacks fossil basis in the crucial process of evolution. There are already people abroad who have expressed doubts about the veracity of evolution.
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Modern apes evolved from Australopithecus, which evolved from more ancient reptiles.
The most primitive organisms on earth are prokaryotes, which evolved from prokaryotes to eukaryotic single-celled organisms, then evolved multicellular animals, gradually evolved from primitive multicellular animals to chordates, and then evolved into higher chordates - vertebrates. The first vertebrates to appear were fish, which evolved from a certain total-finned fish to amphibians, and then to reptiles, and then to a wide range of mammals, and one of the mammals evolved into forest apes, and we humans and various modern apes evolved from forest apes.
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Evolved from reptiles.
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Australopithecus evolved from Australopithecus.
Australopithecus belongs to the family Primates. An important feature that distinguishes the hominidae from the apes is that it is the only primate that can walk upright on two legs. The earliest Australopithecus fossil was found in 1924 at the Towne Quarry in the Cape Province of South Africa, and the fossil was the skull of a young Australopithecus skull.
Professor Dart conducted research on fossils. He found that the skull resembled an ape, but it had many human characteristics; Although the brain is small, it is more human-like than the chimpanzee's brain; Judging by the location of the foramen magnum at the base of the skull, he was able to walk upright.
So, in 1925, he published an article proposing that Towne's infant was a type located between ape and man, and named it australopithecus. This caused a heated debate in the anthropological circles of the time, as most anthropologists at the time believed that a well-developed brain was the hallmark of a person.
Subsequently, in South Africa and other parts of Africa, anthropologists discovered hundreds of ape-man fossils. After various studies, it was not until the 60s of the 20th century that the anthropological community gradually unanimously affirmed that Australopithecus was the fossil of the earliest stage of human evolution, and was classified into the family Homo in taxonomy.
Australopithecus lived between 1 million and 4.2 million years ago. They can be divided into two main types: slender and stout.
Initially, some also considered the differences between the two types to be male and female. The slender type, also known as the African Australopithecus, is about the height of the left and right, the skull is relatively smooth, there is no sagittal protrusion, the eyebrow arch is obviously prominent, and the facial bone is relatively small. The stout type, also known as Australopithecus stout or Australopithecus baueres, is about about tall, has a distinct sagittal ridge in the skull, and has a relatively large facial bone (Fig. 7-1).
Judging from their teeth, the incisors and canines of the stout Australopithecus are smaller, but the molars are large (and the jaws are also thicker), indicating that they are mainly plant-based, while the slender Australopithecus is omnivorous. It is believed that the slender type further evolved into Homo sapiens, while the stout type became extinct about 1 million years ago.
The foramen magnum of the occipital bone of Australopithecus australopithecus is located on the ventral surface of the skull, the spine is curved, the pelvis is short and wide, and the ankle bone is between a man and a typical ape, suggesting that the skeletal scaffold part of Australopithecus is already suitable for upright walking. However, they have longer arms, more developed shoulder muscles, and long toes, which are good for grasping. As a result, Australopithecus can walk upright and climb in forests, but it is not yet suitable for long walks and runs in grasslands.
There is evidence that they live in small clusters of more than 10 people, the equivalent of an expanded family.
To date, the earliest hominin fossils found by paleoanthropologists are about 4 million years old, a gap of 5 million years between this and the latest fossils of Australopithecus (about 10 million years ago), which anthropologists call the "missing link". Once these missing links are filled, the mystery of the origin of humanity will be further solved.
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The first is the stage of chemical evolution: simple inorganic small molecule substances polymerize into organic molecules due to ultraviolet light, lightning, heat, etc.; Organic molecules are then aggregated into larger clusters of organic molecules; After a considerable period of time (about 1 billion years), the most primitive organisms --- prokaryotes were finally formed.
Then there is the stage of biological evolution: simply put, prokaryotes --- eukaryotes (whether eukaryotes are ** than prokaryotes there is no definite answer, only from archaeological fossils, prokaryotes are earlier than eukaryotes) - invertebrates in the ocean (mainly trilobites) - spinal cord organisms (the first to appear is ostracoderm, a primitive fish) - fish continue to evolve and eventually leave the water body, Landing on the continent (the first fish pioneer to land was the total-finned fish) - and then amphibians ---reptiles (dinosaurs and the like) - the dinosaurs flourished until the Cretaceous period, for some unknown reason, there was a mass extinction of all the dinosaurs, and most of the mammals of the time. At this time, primates were in the early ascending stage, so they developed rapidly (because there were no natural predators and competitors) - early small primates continued to evolve, and later large primates appeared - > Australopithecus appeared (4 million years ago) - > homo (2 million years ago) - > Homo sapiens (250,000 years ago) - > man.
At this point, the complex history of biological evolution is as described above, and there is no need to repeat the details of plants and various microorganisms (such as viruses).
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Answer: Human beings evolved as apes, and of course apes need to be born first. Evolution has been a long process, and fossil evidence suggests that the primate evolved from the more ancient Proto-Consul ape, which was also the ancestor of humans. The ancestors of mammals have appeared in the age of dinosaurs, but due to the suppression of dinosaurs, there has been no opportunity for development, until the extinction of large animals such as dinosaurs, mammals ushered in a wide range of development opportunities, due to the whole body fur, small size, constant body temperature, there are better opportunities to adapt, so the number of rapidly increased throughout the continent, geographical isolation led to a wide range of mammals radiation evolution, from a small mammal Archaeopteryx with a body length of only a few centimeters to evolve into today's mammals of various families.
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Hungry, sir, Australopithecus = apes.
The gentleman who asked the question, man evolved directly from humanoids.
Analysis: Monkeys are very similar to apes, and it is likely that they evolved from monkeys.
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There have been several different theories about the origin of primates. The first to appear in the order of primates were some fossils of near-monkeys found in Europe and North America. It is mostly found in Paleocene strata.
Lemurs have appeared since the Eocene, and the early ones are classified into the extinct rabbit monkey family, and they have a wide range of distributions, such as Asia, North America, and Europe, but no fossil evidence has been found in Africa. By the Oligocene, apes and monkeys had emerged and evolved in different directions.
They have claws but no nails. The teeth are three-wedged low crown teeth, which are more general, but the incisors are enlarged and resemble a flat chisel. Near-monkeys are mostly found in Paleocene strata.
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All living things on Earth were one family hundreds of millions of years ago, and they all evolved from proteins, haha.
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There are many, such as the meaning of fire:
1. Eating cooked food is easy to absorb, so that the ape man obtains more abundant nutrition, cooked food and boiling water make the ape man less sick;
2. Slash-and-burn farming, fire promotes the development of agriculture and increases yield; The use of copper, the use of iron, and the invention of pottery are all inseparable;
3. Fire is the most advantageous tool for primitive people to drive away insects, snakes and beasts in the dark night;
The meaning of labor: labor not only exercises the ape-man's body, but also exercises the ape-man's brain. The body and brain accumulate from quantitative changes to qualitative changes, and at a certain moment, human beings are born.
The role of natural selection is also very large. Natural selection has screened out the anachronistic genes of ape-mans and is a very effective genetic filter.
Then there is the natural environment, the end of the ice age brought with it an abundance of food.
Therefore, I think the main factors are: 1) labor (or survival process), 2) natural selection, and 3) suitable living environment.
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Labor played a decisive role. This is what "labor creates man himself" says.
Humans evolved from Australopithecus.
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