Adaptive change of one or another trait within certain genetic limits is called

called the reaction rate
For each species, the norm of the response of the trait is laid in the genotype, the limit within which the trait can change, going beyond the limits of the reaction norm leads to a mutation.

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.