What did the animals on Earth, including us humans, first come to be

Man was transformed by apes! Animals don't know.

Remember.

The first stage, the stage of generating organic small molecules from inorganic molecules, that is, the chemical evolution process of the origin of life, was carried out under primitive terrestrial conditions, a process that has already been described in textbooks and will not be repeated here. It is important to note Miller's simulations. In this experiment, a flask containing an aqueous solution represents the primordial ocean, and its upper spherical space contains a "reducing atmosphere" of hydrogen, ammonia, methane, and water vapor.

Miller first heated the flask to circulate the water vapor in the tube, and then he discharged through two electrodes to generate an electric spark that simulated the lightning of the primordial sky to stimulate the chemical reaction of the different gases in the sealing device, and the condenser tube connected at the bottom of the spherical space cooled the reaction products and water vapor to form a liquid, which flowed back to the flask at the bottom, simulating the process of rainfall. After a week of continuous experimentation and cycling. When Miller analyzed its chemical composition, it found that it contained a variety of new organic compounds, including 5 amino acids and different organic acids, while also forming cyanogenic acid, which can synthesize adenine, which is the basic unit of nucleotides.

Miller's experiments tried to prove that the first step in the origin of life, the formation of organic small molecules from inorganic small molecules, was entirely possible under the conditions of the primitive earth. In the second stage, biological macromolecules are generated from small organic molecules. This process occurs in the primordial ocean, that is, amino acids, nucleotides and other small organic molecules, after long-term accumulation, interaction, under appropriate conditions (such as the adsorption of clay), through condensation or polymerization to form primitive protein molecules and nucleic acid molecules.

In the third stage, a multimolecular system is formed from biological macromolecules. How did this process come about? The former Soviet scholar Obalin proposed the agglomeration hypothesis, and he experimentally showed that when proteins, peptides, nucleic acids and polysaccharides are placed in a suitable solution, they can automatically concentrate and aggregate into dispersed spherical droplets, which are aggregates.

Obarin et al. believe that aggregates can exhibit life phenomena such as synthesis, decomposition, growth, and reproduction. For example, aggregates have boundaries similar to those of membranes, and their internal chemical characteristics are significantly different from those of the external solution environment. The agglomerate can inhale certain molecules from the external solution as reactants, and can also undergo specific biochemical reactions under the catalysis of enzymes, and the products of the reaction can also be released from the agglomerates.

In addition, some scholars have also put forward other hypotheses, such as microspheres and lipid spheres, to explain the process of forming multimolecular systems of organic polymers. Figure 7 Schematic diagram of simple metabolism of aggregatesIn the fourth stage, the organic multimolecular system evolved into primitive life. This stage was formed in the primordial ocean and is the most complex and decisive stage in the process of the origin of life.

At present, it is not possible to verify this process in the laboratory.

The oldest traces of animal life date back to 1 billion years ago, and the earliest animal fossils appeared 600 million years ago, during the Sinian period. The most primitive lower animals live on the seafloor and in the vicinity, with soft bodies that can only be seen under a microscope. Almost none of these animals have formed fossils, leaving only some traces such as caves, traces, etc.

With these relics, we can learn about them indirectly; Although they are small in size, they are quite numerous, and because of them, the first animals on earth that can be seen with the naked eye, the Ediacara fauna.

The sponge may have been the first animal to evolve in Earth's history, but it is difficult to determine exactly when it appeared. Now, an analysis of ancient rocks and oil has found that it may have appeared in the ocean at least 100 million years earlier than we originally estimated.

Generally speaking, it should be bacteria, and it originally lived in the ocean, it is an invisible organism to the naked eye, and after a long evolution, it gradually extended to the land.

The first animals to appear in the world were supposed to be mollusks.

So far, there is no scientific theory about this, and there is that kind of animal that appeared first! Hope.

The first to appear on earth must have been apes, right?

The earliest human found in the world - Ramaucus.

In 1910, the first fossil of Rama Australopithecus was discovered in the West Varik Mountains on the border between Pakistan and India, and it was a fragment of the maxilla. In 1934, it was named Ramaucus. In the sixties and seventies, fossils of Australopithecus were found in Kenya, Greece, Turkey, Hungary, Pakistan and Yunnan Province of China.

Ramaucus has been identified as having lived between 14 million and 8 million years ago. Archaeologists have theorized that Ramapicus was initially able to walk upright on two legs, lived in forest clearings or forest fringes, and ate mainly plant fruits, but may also have eaten a little meat. It is the earliest human found in the world.

The earliest human found in China - Yuanmou Man.

In 1965, in Yuanmou County, Yunnan Province, archaeologists found two ancient human teeth and some rough stone tools.

Scientists have identified this as the bones and relics of ancient humans, about 1.7 million years ago. The ancient humans found in Yuanmou are called Yuanmou people. Yuanmou Man is the earliest human species found in China.

Human origin and evolution are divided into four stages: early ape man (early Homo erectus), late ape man (late Homo erectus), early Homo sapiens and late Homo sapiens, and the difference between apes and humans is not mainly in the manufacture of tools, because it is well known that chimpanzees also make and use tools, so the boundary between humans and apes should be accurate to say that they can make tools and have been walking upright on two feet.

The order of appearance of living things on the earth is from low to high, from simple to complex, from imperfect to perfect.

Bacteria are the lowest, followed by plants, and animals are the highest, and these three categories of organisms also follow this law.

Among plants, fruits belong to the phylum Angiosperms and are already the higher forms of plants. Before angiosperms, there were gymnosperms, ferns, and even early cyanobacteria, among others.

Due to the lack of direct evidence such as fossils, it is generally believed that angiosperms appeared from the Late Jurassic to the Cretaceous in the Mesozoic Era, and the Cambrian of the Paleozoic Era began to "explode", and in the Carboniferous of the Paleozoic Era, amphibians began to evolve into reptiles.

In terms of time, angiosperms appeared about 100 million years ago, while reptiles appeared between 100 million years ago.

So, the conclusion is that although plants predate the appearance of the animals, the ancestors of the fruit plants that you are talking about belong to the phylum Angiosperms later than the appearance of land animals. In other words, angiosperm plants evolved gradually through natural selection after the emergence of animals