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In fact, for us, the evolution of life on Earth itself is an evolutionary process from low to high, from simple to complexIt is precisely because of this that most of the life on the earth is, after all, the existence form of a simple life structure, and it is precisely because so many species are definitely not animals, so we can think about the problem from the following aspects. <>
1. Most of the time, life on the earth is an evolutionary process from simple to complex, from low to high, and it is precisely because of this that lower organisms are universal. It has to be said that the evolution of life on the earth itself has an evolutionary process from simple to complex, from low to high, and it is precisely because of this that millions of organisms on the earth will be dominated by the lower organisms in the form of most simple life, and it is precisely because of this that most organisms will belong to microorganisms. <>
2. In fact, for us, the body structure of animals is relatively complex, and it is precisely because of this that the evolution time is relatively short, so there are relatively few species. In fact, I have to say that we will find that animals have better activity space than plant microorganisms, and the body structure is more complex, so in some senses, this is also the most fundamental reason why animal species are less than plant microorganisms It is precisely because of the complex structure of animal bodies that it needs to go through a long evolution, so the evolutionary cycle is shorter and there are fewer species. <>
3. At present, most of the millions of organisms living on the earth are not animals, and for us our world is the world of microorganisms. In fact, it has to be said that from macro to micro, we will find that microorganisms are everywhere, and it is precisely because of this that we can clearly feel that there will be tens of thousands of microorganisms in every animal, and it is precisely because of this that our world will be a world of microorganisms, and not most organisms are animals.
In fact, for us, the evolution of life itself is a process of evolution from low to high, from simple and complex, and it is precisely because of this that these simple life existences must be the most basic, and the animals built on this basis are more complex than the body structure, and the evolution cycle is relatively short, so the majority of species must be microorganisms.
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No. Because there are more plants than animals in the earth, only a small percentage are animals.
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Until the mid-60s, scientists thought there were about 3 million species on Earth, and now they believe there are at least 5 million. But many experts point out that the conservative estimate is 10 million. According to the rate of increase in the yield of the species, the final total impulse of the animal species is:
There are 4,300 species of mammals, about 8,000 species of birds, 6,000 species of reptiles, 3,500 species of amphibians, and 10,000 species of fish. Recently, surveys of insects in Peru's tropical forests have led to the discovery of many new species, leading to estimates that the total number of species on Earth exceeds 30 million. In the world, the Amazon and the Zasan-Burn Basin are considered to be the most species-rich regions.
Of the remaining species, 20 percent grow in Latin American forest calendars other than the Amazon, and another 20 percent in Asian forests and African forests outside the Zaire Basin. To date, the total number of identified species is only 1.4 million to 1.74 million. About 87% of mammals, reptiles, amphibians, birds, and fish have been identified, while most of invertebrates and microorganisms have not yet been recognized, and more than 90% of all plants have not been studied.
As a result, human beings still have a very limited understanding of the abundant species resources, and only a small part of them are exploited.
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Animals on Earth.
How many are there? To say exactly how many species of animals there are on the earth, I am afraid that even experts dare not guarantee it, because the understanding of animals is also accumulated with the continuous discovery of science and the continuous understanding of nature.
Aristotle, the great scholar of ancient Greece, described 450 species of animals in the 3rd century BC; The first taxonomist of flora and fauna, Rinnai, described about 4,000 species of animals in the first half of the 18th century; In the first half of the 19th century, there were 48,000 known species of animals; By the end of the 19th century, there were 500,000 recorded animal species; At present, there are more than 1 million species of animals in the data, and according to taxonomists, this number still does not reach the actual number of species.
In various scientific journals around the world, the discovery of hundreds of new species of insects is reported every year, which shows that our understanding of insects is far from enough. In 1931, a total of 80,000 species of butterfly moths were known, and by 1942, 10,000 new species had been discovered. Some zoologists speculate that there may be 2 million species of insects in nature that are not well known.
In vertebrates, fish are also understudied. In 1938, off the coast of South Africa, a strange large fish was caught by chance, and the fishermen sent the fish to a local museum, and without detailed study, the skin of the fish was made into a specimen, and later, when the experts studied its specimen and skull, they found that the fish was extraordinary, it not only belonged to a new family independently, but also belonged to a new species, and the fish in this order had long been considered extinct millions of years ago. This fish is extremely rare, and in the six years from its discovery to 1954, only eight fish were caught.
In addition, new species of mammals that we believe have been well studied are constantly being discovered, as evidenced by the discovery of the small rodent Cercythia rat. Therefore, how many animals there are in nature is a constantly changing number. In this world, the creatures that are most closely related to human beings are plants.
So far, about 500,000 species of plants have been discovered worldwide, of which about 350,000 have been named by scientists.
Online information.
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There are about 1.5 million known species.
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According to zoologists, there are about 1.5 million known species of animals on Earth.
Animals can be divided into two categories: vertebrates and invertebrates, vertebrates have a vertebral column composed of many vertebrae on the back of the body, and the individual is generally larger; Invertebrates have no vertebral columns, and most of them are small, but they are diverse, accounting for more than 90 of the entire animal population. For example, insects such as flies, mosquitoes, grasshoppers, butterflies, etc., are invertebrates. Vertebrates can be divided into five major groups: fish, amphibians, reptiles, birds and mammals.
Fish are the largest group of vertebrates, with a total of 25,000 to 30,000 species including marine fish and freshwater fish, such as carp and yellow croaker. There are more than 2,000 species of amphibians, such as frogs. There are more than 3,000 species of reptiles, such as snakes, turtles, crocodiles, etc.
There are 9,000 species of birds, such as pigeons, sparrows. There are more than 4,500 species of mammals, such as horses, cows, lions, tigers, etc. There are still many species of animals in the world that have not yet been discovered.
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There are about 1.5 million species of animals currently known, and insects are a large group of organisms with the largest number of species, the largest number of individuals, the most diverse lifestyles, and the most peculiar survival strategies on the earth There are at least 1 million species of insects in the world, and insects have 2 pairs of wings and 3 pairs of legs, so there are about 1.5 million species of animals on the earth, of which the most diverse animals are insects
Therefore, c
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