Researchers report that the ratio of brain regions with different functions in the animal's brain is an important feature of the species. They found that in the same species, there may be significant differences in brain capacity between different individuals, but the brain structure The characteristics are basically the same; there are large differences in structural characteristics between different species. Based on this, researchers believe that the structural characteristics of the brain will help distinguish the genetic relationships between different species. They also pointed out that changes in the brain structure, It usually marks the evolution of new populations. For example, the evolution from the more primitive lemur to the present monkey; from ape to human, the main change in the brain is the increase in the proportion of the new cerebral cortex. From this we can infer:. ['The cerebral cortex of smart people is more developed than ordinary people.', 'The human cerebral cortex is more developed than the monkey.', 'Structural similarity between the human brain and the ape brain is greater than the structural similarity between the monkey brain and lemur brain.', 'The similarity between chimpanzee and gorilla brain structure is greater than that of chimpanzee and monkey brain structure.']