1) Mutations are material for natural selection.
2) Individuals that retain mutations in their genotype multiply, as a result of which the genetic heterogeneity of the population increases
3) The result of natural selection is the conservation of individuals with useful traits, their reproduction, as a result of which the adaptability of organisms is improved and new species arise
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.