1\ In fact, biological classification, classification and demarcation are all means of biological research and a basic research method of classification. Biological classification mainly divides organisms into species and genera according to their similarities (including morphological structure and physiological functions, etc.). ), and scientifically describe the morphological structure and physiological function of each group, so as to clarify the genetic relationship and evolutionary relationship between different groups. Delimitation is to classify from a big perspective.

Biological improvement refers to the transformation of existing organisms, changing their characteristics, and obtaining the ability that is more conducive to production and survival. For example, the popular transgenic effect, strawberry is as big as apple, which is conducive to the adaptation of organisms to the environment, the evolution of species in a better way, and the improvement of crop yield and quality.