Among the three stages of the evolutionary civilization process of life, the low-level biological stage and the advanced biological stage are the longest and most endless ends of the time and space chart of the biological evolutionary civilization process. The intermediate biological stage is the transition stage of the transition between the low-level biological stage and the advanced biological stage. It is also the stage in which humans begin to evolve civilization and occupy a dominant position in the process of biological evolutionary civilization. This stage is very short in the air of the evolutionary civilization process of life on earth, but it is also a key process. ≈ is the bridge between the transition from low-level organisms to advanced organisms, while the unnatural oxidation natural society and natural reduction natural society in the intermediate biological stage are the bridges among the bridges in the process of life evolution civilization. In the evolutionary civilization process of life, oxygen in the air has always occupied the main content of the evolutionary civilization process of life on Earth.
Primitive life survives and reproduces on the earth, and eventually an oxygen accumulation process formed the biosphere of life on earth. Oxygen becomes the main part of the atmosphere and the component of the life cycle. The redox of organisms and non-organisms revolves around oxygen. Except for primitive life, almost all organisms revolve around oxygen. Without oxygen, there is no life, there is no vibrant biological world, and there is no evolutionary civilization of human society. Therefore, oxygen is the most important external substance that constitutes the evolutionary civilization of life on Earth.
On Earth, the origin of life should be traced to the evolution and synthesis of the Earth’s atmosphere. The evolution of the atmosphere has special significance because it creates conditions for the emergence of life.
In the peaceful era before the end of the world, scientists from all countries have speculated that the evolution of the Earth’s atmosphere was roughly divided into three generations, and the first generation of atmosphere, namely the primitive atmosphere, may have escaped in the early stages of the Earth’s evolution. The second generation of atmosphere is the earth’s gradual contraction of radioactive decay and heat release and the original earth’s matter gradually shrinks, heavy matter sinks into the core, light matter floats up, and finally forms today’s layered structure of the crust, mantle and core, and internal matter produces physical and chemical reactions and squeezes out. We call reducing the atmosphere. The lack of oxygen in the reducing atmosphere. The nitrogen in our air may gradually increase and become the main gas for reducing the atmosphere. Biogas, carbon dioxide, and water vapor may account for a considerable component in the reducing atmosphere. Volcanic explosions and geological changes can produce a considerable amount of hydrogen, carbon monoxide, and hydrogen sulfide gas. In addition, there are some rare gases with relatively stable chemical properties, such as argon, krypton, xenon and other gases.
During the long geological age, the evolution of life and the evolution of the atmosphere were intertwined. The characteristics and composition of the atmosphere are determined by the form of life on the earth now. They are completely different in the characteristics and composition of the atmosphere in the absence of life, and of course they are completely different from the atmosphere near our inanimate planets and Mars. The creation of life only occurs after the formation of the earth. If oxygen, an important part of the atmosphere, was formed a long time later. Scientists can only carefully speculate on the evolution of life on Earth on the issue of the origin of life. About 400 million years ago, there were only rocks and water on the earth. The hot sunlight hits directly on the surface, forming a very highTemperature and oxygen-deficient atmosphere allow ultraviolet rays from the sun to unimpededly hit the surface, and ultraviolet rays have extremely strong chemical activity.
Various chemical reactions produced in the atmosphere and the surface have caused a large number of organic matter such as amino acids, nucleotides, monosaccharides, etc. on the surface of the earth, which is only inorganic. These organic matters continue to react chemically and gradually polymerize from simple organic matters into complex organic matters. Biomacromolecular proteins and nucleic acids appear. These proteins and nucleic acids are slowly stored and gathered in seawater. After hundreds of millions of years of long-term development, life monomers with self-replication function have finally appeared. When the monomers of life appear, the evolution of life in the process of natural selection begins. The monomers of life evolve in increasingly complex directions, first primitive single-cell organisms, and then in two directions. First, autotrophic function is strengthened and motor function is degenerated, evolving into monocytic algae plants, becoming the source of evolution in the plant world. The other direction is the enhancement of motor function and heterotrophic function, the degeneration of autotrophic function, and the evolution to single-cell protozoa, becoming the source of evolution in the animal world.