What animals we evolved from?

Modern molecular biology believes that humans evolved from a species of australopithecus in East Africa about 2 million years ago and migrated from Africa to other parts of the world. We all came out of Africa. Based on the rate of evolution of female mitochondrial DNA.

Scientists collected mitochondrial DNA from different people around the world to do research, and extrapolated forward, and finally came to this conclusion. Of course, if you want to ask what kind of animal Australopithecus evolved from, it can only be said that it is some kind of single-celled organism in the ocean hundreds of millions of years ago.

Your grandfather is your ancestor, your grandfather's grandfather is also your ancestor, grandpa's grandfather's grandfather's grandfather's grandfather's ......All in all, it's your ancestors. But if you ask who your ancestors were, then that's an incomplete question. Because evolution is processed, it is gradual.

There were Homo erectus before Homo sapiens, Australopithecus australopithecus before Homo sapiens, and insectivorous ancestors before Rama australopithecus, and before that there were therodont reptiles, subclass reptiles, ichthyosaurs, flesh-finned fishes, Wenchang fish, cephalic chordates, caudal chordates, ......to unicellular animals and finally primitive macromolecular organisms.

You can't be sure until you have a time machine that flies back 10,000 years.

It's all speculation, and no one has a final answer.

Most humans believe that it is the forest australopithecus.

The evolutionary process of vertebrates is: primitive fishes, primitive amphibians, primitive reptiles, primitive birds, and primitive mammals.

The evolution of vertebrates is a long process. From the earliest armored fish gradually evolved to amphibians, and from then on, organisms began to evolve from aquatic to terrestrial; From amphibians to reptiles, from reptiles to birds and mammals, and finally from humans to mammals. Obviously, it is this evolutionary process from simple to complex, from lower to higher that has created the highest group of organisms in the animal kingdom.

Difference Between Vertebrates and Invertebrates

The main difference between vertebrates and invertebrates is that vertebrates have vertebral vertebrae or vertebral columns, while invertebrates do not. Examples of vertebrates are humans, dogs, cats, and birds. Examples of invertebrates are flatworms, mollusks, sea urchins, and insects.

Vertebrates have a well-developed internal skeleton, an outer layer of protective cells**, an advanced nervous system, and a highly developed brain. Invertebrates are heterotrophic and multicellular and do not have a cell wall and no skeleton. The features that distinguish vertebrates from their peers are the vertebral bones and notochords of vertebrates.