Why is a population considered a unit of evolution?

1) Mutations accumulate, which lead to a change in the gene pool
2) Migration, gene exchange, gene drift are carried out
3) There is a struggle for existence and natural selection, as a result of which the most adapted individuals remain.

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.