Can you give examples of modifications that are not adaptive?

No. Modifications are adaptive. This means that in response to the changing environmental conditions, the individual manifests phenotypic changes that contribute to its survival. For example, a person who is high in the mountains increases the red blood cell count in his blood to provide oxygen to his body cells.

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.