List the properties of phenotypic variation. Compare it with genotypic variation.

Phenotypic variability is characterized by the following basic properties: 1) non-heritability; 2) the group nature of the changes; 3) the dependence of changes on the action of a certain environmental factor; 4) the conditionality of the limits of variability by genotype, i.e., with the same direction of changes, the degree of their severity is different in different organisms.

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.