The main characteristics of modification variability:
1. Modification changes are not transmitted from generation to generation.
2. Modification changes occur in many individuals of the species and depend on the action of environmental conditions on them.
3. Modification changes are possible only within the limits of the reaction norm, that is, in the final analysis they are determined by the genotype.
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.