The Evolution of Human EvolutionThe following is the evolution process of human evolution:
1. ** Protocell and Early Microorganism Stage **: The initial life form is a single-celled microbiotic protocell, which only contains simple genetic protein, but does not have a nucleus or membrane structure. Over time, the DNA evolved from the DNA, and the protocell evolved into a specialized organelle to become a complex organism, eventually forming eukaryons and laying the foundation for a variety of life forms.
2. ** The earliest animal stage **: The Dickenson jellyfish is the earliest known animal. It is a simple flat creature without a mouth and digestive system, but it is a multi-celled creature with a certain complexity. Later, the earliest complex organ systems appeared, such as bilateriality, the early nervous system, and the circulatory system. The simple eyes (eye points) also appeared in the beginning of the vertebrae.
3. [Fish and quadruped stage: Fish are the earliest vertebrae, with stomach, spleen, scales, teeth, blood and other body parts.] The evolution of bony fish brought about complex changes in the skeletal system, producing 'protolimbs' that allowed creatures to walk on land. Creatures like Titalik had specialized bones that could support their weight when they left shallow water. They gradually evolved into quadruped animals with limbs, vertebrae, and lungs. Ambipedes, reptiles, birds, and mammals were all descendants of primitive quadruped animals.
4. ** Earliest Mammals Stage **: The earliest Mammals appeared about 200 million years ago. They were small, shrew-like creatures that coexisted with dinosaurs. After that, it evolved into hair, specialized teeth, sweat glands to regulate body temperature, and a more efficient circulatory system. It also had characteristics such as nighttime, breast, and external genitalia, which were different from birds or reptiles.
5. ** Great apes and the earliest stages of Homo species **: The earliest great apes appeared in Africa about 7 million years ago, such as orangutans, gorillas, and chimpanzees. They were highly intelligent and social. Later, an ape gave birth to the earliest Homo species. The main developments during this period included all-weather bipedal walking, increased brain size, advanced skeletal development for tool making and hunting, and inventions such as fire and clothes appeared in the early stages of Homo. Later, complex language, hair loss, and dramatic facial changes evolved. However, the exact evolution of the Homo species is difficult to determine due to overlapping fossil records.
Since it is impossible to directly provide a map of the evolution process, it is recommended to draw or consult relevant professional books and websites to obtain an accurate map of the human evolution process according to the above content.
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