Why is a population called a structural unit of evolution?

A population is a structural unit of a species. It is represented by a set of individuals of the species, has a common gene pool and occupies a certain territory within the range (distribution area) of this species. Populations are exposed to different directions of natural selection. This is because territorial isolation impedes the frequent exchange of genetic information between isolated populations. Therefore, gradually between these populations divergence (divergence) occurs along a number of genetic traits. They accumulate through mutations. The differences that appeared provide non-crossbred individuals of one population with individuals of other populations of the original species. As a result, the isolated population becomes an independent new species, singled out by divergence from the original species.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.