Rules concerning who one is allowed to marry are determined by culture. Even whether or not a handkerchief or tissue is used when a person blows their nose is determined by culture. The concept of culture encompasses everything people do and the way it is done. This is the type of culture that people are most familiar with, the transfer of information by behavioral means. Another culture, biological culture, is what I will deal with here.
Biological culture affects the behavior of people through structure of the human body.
A person's hair texture, height, skin coloring, and even the shape of the nose are examples of things determined by biological culture. Here we will see how culturally biological factors are determined and how the diversity they create is a survival tool for the people that live on this planet. Different modes of survival are required in order to survive in the different regions. Materials used for clothing and housing are different and the composition of diet is different according to what natural materials and food the area yields. Physical endurance also varies from region to region.