Are there still prehistoric creatures on Earth today? What is the scientific basis?

Sharks aren't they? Modern sharks are basically the same as they were in ancient times.

Living fossils are not the same as prehistoric organisms, and even living fossils are in a constant process of evolution. By strict definition, there are no prehistoric creatures on Earth, only modern ones.

Without. It's all modern creatures, and it depends on your definition of the word "prehistoric". If you call it "prehistoric" tens of thousands of years ago, there were many, but if it was hundreds of millions of years ago, there were none.

Don't take cockroaches and horseshoe crabs back to me, these are fundamentally different from ancient cockroaches and horseshoe crabs, and they can only be said to be their descendants, but their appearance has not changed much.

Jellyfish and anemones are the remnants of the Ediacaran period, and there is no essential change until now.

Of course, the Komodo dragon, the largest lizard on Earth, is also an ancient remnant of the species, and is aggressive by nature, and now their numbers are very endangered and have the possibility of extinction. ‍‍

Cockroaches are. Cockroaches are one of the oldest insects on the planet and once lived in the same era as dinosaurs. According to fossil evidence, primitive cockroaches appeared on Earth about 400 million years ago in the Silurian period. ‍‍

There is still a part of prehistoric creatures. Among them, there are many plants, such as cedar trees. Fauna is quite scarce, because the environment has changed quite dramatically to the present day, and almost all the prehistoric organisms that still exist are aquatic organisms.

The changes on land are so drastic that they no longer exist. Several prehistoric creatures, such as horseshoe crabs. About 300 million years ago, in the Devonian period, horseshoe crabs lived on Earth in their current form.

The heavy carapace protects it and allows it to adapt to changes to a certain extent. And the annelids and mollusks in the horseshoe crab's diet have not completely died out, allowing the horseshoe crab to continue its life to this day. This creature lives mainly in bays and estuaries.

Australia's kangaroos are ah, Australia was almost isolated from the world before it was discovered, and the creatures there could not communicate with the creatures of the outside world, so most of them retained their original features, kangaroos are one of them, and the deep-sea king squid discovered in recent years. ‍‍

Sponges can even be traced back to the first non-microbes on Earth, where they existed hundreds of millions of years ago. It is one of the top 10 living prehistoric animals. Sponges belong to the phylum Porous Animals, which are primitive multicellular organisms, also known as Sponges, and are generally called sponges.

Sponges are now considered to be the most primitive and lowestly aquatic multicellular animals, as they possess almost all the basic animal characteristics.

Scientists at Umeå University in Sweden have discovered the world's oldest tree in a mountain range in central Sweden, with a root system that is 9,500 years old and still growing. Known as Old Tjikko, the European spruce (also known as Norway spruce) was discovered in 2004 by scientists during a tree census in Sweden's Fulufjallets National Park, and after carbon-14 dating, it was found that its root system was at least 9,500 years old, but the trunk was relatively young. Scientists say the tree's ability to survive so long is due to its vegetative reproductive properties, which means it can effectively clone itself.

No other tree could have lived that long. The 4-meter-tall trunk of the tree looks quite young, but its root system has been growing for nearly 10,000 years.

Absolutely. The Chinese sturgeon appeared in the Cretaceous period 100 million years ago. and dinosaurs for an era. The current Chinese sturgeon is not very different from 100 million years ago, it is the same species. The Chinese sturgeon is an endangered protected animal.

There are still quite a few prehistoric creatures in existence, such as crocodiles, which are one of the earliest and most primitive animals ever found alive. Appearing in the Mesozoic Era (about 200 million years ago) from the Triassic to the Cretaceous, it is a ferocious vertebrate reptile that is a contemporary of the dinosaurs.

The first organisms to appear on Earth were cyanobacteria, which are both single-celled organisms and prokaryotes (organisms made up of prokaryotic cells), which have been widespread until now. However, due to the age of the earth, there is no accurate evidence and statement about what the earliest creatures buried on the earth were.

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, which in turn produces some gelatinous substances, which will not only stick to cyanobacteria, but also to sediments in the ocean, which over time will be layered on top of each other to form stromatolites.

Although cyanobacteria appeared early in the area and survived for a long time, it does not mean that it has become extinct, and now it is easy to bring harm to the fishery and aquaculture industry, which is the eutrophication of seawater "red tide" and other phenomena produced by cyanobacteria after being polluted by nitrogen, phosphorus and other elements.

According to research, the oldest remains of life on Earth have been found in the ancient rocks of Greenland, but we are still not sure what is the earliest life on Earth.

The earliest organisms on Earth were prokaryotes in the fossil record.

The earliest organisms on Earth were prokaryotes in the fossil record. Prokaryotes are a class of simple and tiny single-celled organisms whose cells do not have a eukaryotic structure and do not have a nucleus and other complex organelles. According to the fossil record discovered by geologists, prokaryotes can be traced back to the early days of the Earth, which were leased about 3.8 billion years ago.

Prokaryotes have a certain ability to withstand harsh environmental conditions, and in the early days of Earth, prokaryotes were probably the only biological forms that could survive and reproduce. These early prokaryotes can be divided into two main groups based on evidence such as fossils and molecular genetics: bacteria and archaea.

Bacteria live in a variety of environments, including water, soil, air, and other organisms, whereas archaea are commonly found in extreme environments such as high hot springs, deep-sea hydrothermal vents, etc. These early prokaryotes provided the basis and source for the evolution of life on Earth later. The emergence of prokaryotes marked the beginning of life, and they gradually developed and evolved over a long evolutionary process, gradually forming microshed key nuclei and other complex organelles, and then evolving into eukaryotes, forming the types of organisms we are familiar with today.

The origin and evolution of early life

The origin of early life is a well-known scientific question that is important for understanding the origin and evolution of life on Earth. Although scientists have not yet found conclusive evidence to explain the details of the origin of early life, through research in fields such as the fossil record and molecular biology, we can have some understanding of the origin and evolution of early life.

According to the fossil record and earth science research, the earliest life appeared in the early days of the Earth about 3.8 billion years ago, after the formation of the Earth about 4.6 billion years ago. These life forms are prokaryotes in the fossil record, such as bacteria and archaea. Prokaryotes are the earliest life forms, they exist in the form of single cells, there is no eukaryotic structure, and the cells are relatively simple.

Prokaryotes have a certain ability to adapt and survive and reproduce in different environments.

Select AA, 3.8 billion years ago, primitive cells appeared.

b, 3 billion years ago, cyanobacteria began to appear.

c, 4.6 billion years ago, the primitive earth was formed.

d, 65 million years ago, hominids appeared.