Sometimes characteristics are not heritable but are environmentally influenced. describe three characteristics that are not inherited but affect survival

1. Growth (height and weight). It can be limited by the environment lacking essential nutrients in sufficient quantities.

2. The density of red blood cells. It varies in direct proportion to the atmospheres partial pressure of oxygen. People living at high altitudes acclimate and produce more red blood cells.

3. Corrective surgery or organ transplant. Improves the quality of life of humans but is not heritable.