What was the first life on Earth?

The earliest life on Earth.

500 million years ago, the land was full of bare mountains and earth, and there was no life except stone and sand, and there was no soil on which life depended. It wasn't until 425 million years ago that seaweed accumulated enough oxygen in the Earth's atmosphere to form an ozone layer to protect life exposed to sunlight that organisms could surface. The first life on Earth appeared 4.5 billion years ago.

Life at this time was something like a bacterium, it had only one cell, and all plants and animals on Earth today are made up of cells. In the long years that followed, this small, single-celled life spread across the oceans and lived in solitude for about 2 billion years. At this time, the earth was empty and lonely, and the air was poisonous and impossible to breathe.

There is no oxygen in the atmosphere, and there is no ozone layer to protect life, and the intense ultraviolet radiation that hits the ground can kill the vast majority of life in just an hour. About 700 million years ago, single-celled organisms evolved into multicellular organisms, which, like today's plants, relied on photosynthesis to absorb carbon dioxide and release oxygen. It took a long time for this small life, which can only be seen under a microscope, to fill the Earth's atmosphere with oxygen.

In this way, the earliest life on Earth evolved from simple single-celled organisms to some more complex life. This is a major breakthrough in life. Some experts speculate that lichens were the first life on shore, and it was the decomposition of the rocks by the lichens, coupled with the natural differentiation that laid the groundwork for the creatures that landed later, because no other terrestrial life could survive without soil.

Life ...... in the process of evolution

Scientists have discovered the earliest single-celled organism on Earth 3.8 billion years ago, and it is structurally bacterial. This is the first life on Earth.

No one knows when, it's all speculation. Keep in mind that evolution is a scientific hypothesis, not a scientific fact.

Life on Earth originated between 4.6 billion and 3.5 billion years ago.

To date, the oldest fossils of organisms have been found from Western Australia, about 3.5 billion years ago. These fossils, similar to the current cyanobacteria, were some primitive life, the size of which was only a few microns to dozens of microns.

There are many conjectures and hypotheses about the origin of life, and there are many controversies, and it is a major problem that modern natural science is trying to solve. The theory of the origin of chemistry is now generally accepted by the academic community, which is based on the theory of "The Origin of Species" and Miller's experiments. With the deepening of understanding and the discovery of various evidences, people will have more in-depth research on the question of the origin of life.

As early as 4.6 billion years ago, the earth was born, but at that time, the earth was a barren land, there was no life form, it is said that the earliest life form on the earth appeared about 4 billion 35 billion years ago, that is, the Cambrian period named by scientists through research, the specific reason is that in 1977, fossil research experts at Harvard University found a stone 3.4 billion years ago in South Africa that contains bacterial fossils. <>

1. The Cambrian PeriodAs early as the distant Cambrian period, thousands of new organisms were born in the sea, perhaps because they longed for the ocean, and the earliest creatures were born in the shape of champagne glasses that we see now, and some animals lived in tubular structures. Immediately after that, herbivores with hard shells and the earliest predatory carnivores appeared, and perhaps the animals of this period look strange and strange to us modern people, because they have no living relatives. Some of these creatures became the ancestors of the worms and shellfish and vertebrates that we see today, and I have to say that nature is really amazing.

The increase in oxygen levels in the oceans was probably the main reason for the abundance of life during the Cambrian period, when the Earth first appeared, it was an environment that was not suitable for any living thing. <>

2. Stages of the evolution of life Archean fossils and relatively stable isotopic patterns in Australia and South Africa show that life on Earth is very similar to the oldest rocks on Earth, and that it may be said that in the early Archean period, that is, 3,538 billion years ago, relatively simple single-celled forms of life appeared. When the simplest cellular life on the earth was born, that is, the first form of life in the biological membrane and inner membrane that we now know separated from the outside world, they have very distinctive morphological characteristics, marking the evolution of the early stage of life, the earliest biological evolution was in the emergence of cellular life, and such a life form lasted for 3.8 billion years, about 600 million years ago in the Phanerozoic period, human beings on the earth entered the stage of civilization, from this time, The evolution and evolution of various organisms on Earth were affected by human activities, and finally with the passage of time, advanced humans like us appeared. <>

I have to say that if you are interested in learning about the distant ancient period, you will find out how wonderful the artifact of nature is, from a single-celled organism to a link, a creature to a vertebrate creature, and finally evolved into a variety of animals, some animals because of the desire for the ocean to turn into fins, some animals because of the desire for the sky to grow wings, with the development and change of the biological form on the earth, we humans have developed to the current level.

The earliest life on Earth appeared 650 million years ago, during the Cambrian period, when the Earth belonged to the age of algae and invertebrates.

The earliest life on Earth was during the Cambrian period. This period is 4 billion years from today. The discovery of a stone in South Africa from 3.4 billion years ago is enough to prove that it is very old.

The earliest life on Earth was during the Cambrian period, 40-3.5 billion years ago. Scientists in South Africa have found fossils of bacteria in a stone from 3.4 billion years ago.

Was the first life on Earth to appear in the Paleoprotera?

1. The earliest single-celled organism found so far is 3.5 billion years old from fossils.

2. Scientists estimate that life on Earth may have appeared about 3.8 billion years ago. Less than a billion years after the birth of the Earth, life appeared on Earth.

3. To date, the oldest fossils of organisms found with codes are rocks from Western Australia, about 3.5 billion years ago, these fossils are similar to the current cyanobacteria, they are some primitive life.

The first life on Earth was born in the primordial ocean 3.5 billion years ago and was cyanobacteria. Cyanobacteria, also known as cyanobacteria, cyanobacteria, are unicellular organisms (organisms with only one cell) and prokaryotes (organisms composed of prokaryotic cells).

The first life on Earth - cyanobacteria.

At the beginning of the earth, there was no oxygen in the atmosphere on the earth, but there was a lot of carbon dioxide. Cyanobacteria inhale carbon dioxide through photosynthesis and release oxygen, and are also the earliest oxygen producers.

Cyanobacteria secrete a lot of sticky gelatinous substance that they use to anchor themselves to rocks in shallow waters, which is their main habitat (this method is still used by algal organisms and colonies today). When a large number of cyanobacteria come together, they will also secrete a large amount of gelatinous substance, which will not only stick to the cyanobacteria, but also to the sediments in the ocean, and over time, these sediments will be layered on top of each other to form stromatolites.

Stromatolites are the oldest fossils of life.

Although it is the oldest life on the earth, cyanobacteria are not extinct, and they are still active on the earth, and even often polluted by nitrogen, phosphorus and other elements cause eutrophication of seawater "red tide" and other phenomena, bringing harm to fisheries and aquaculture. If you want to see real stromatolites, head to Australia's famous Hamelin Pool.

The above content refers to Milley's children's book "A Brief History of Life".

Originally, the earth was just born du

At that time, there was no living thing on the earth.

However, billions of years ago, the earth was much hotter than it is now, and the climate was much worse, with frequent lightning and thunder over the oceans, and extreme climatic conditions (high heat, high pressure, etc.) produced the first organic matter, which can be said to be what we often call protein now. Its morphology is somewhat similar to that of today's viruses, it doesn't even have DNA, just RNA (you can find out more about DNA and RNA). Later, in extreme environments, these simple proteins coalesced together to produce primary algae.

These algae have undergone hundreds of millions of years of evolution, and finally some algae have become plants that survive on photosynthesis, while others can move autonomously and rely on other algae for food, which is the precursor of animals.

Of course, these are all speculations by scientists, and no one can reproduce this process in the laboratory. There are even some scientists who doubt this speculation.

But the hypothesis that life originated from the ocean has become a consensus in the scientific community.

The earliest life forms that appeared on Earth were primitive single-celled organisms

Note: Organisms such as viruses that do not have a cellular structure cannot complete life activities independently, so they are not life forms.

The earliest life on the Earth is currently generally believed to be a primitive cell that emerged in the Precambrian (600 million years ago). The primitive cell, also known as the ancient cell, is the ground plate.

The earliest and longest life on Earth, it has never been extinct to this day. Most of them were single-celled organisms, but they gradually evolved into multicellular structures over a long period of time, and eventually became the ancestors of modern organisms.