The ABO system consists of A, B, AB, and O blood types. People with type A have antibodies in the blood against type B. People with type B have antibodies in the blood against type A. People with AB have no anti-A or anti-B antibodies.People with type O have both anti-A and anti-B antibodies.People with type AB blood are called universal recipients, because they can receive any of the ABO types. People with type O blood are called universal donors, because their blood can be given to people with any of the ABO types.eople with type O have both anti-A and anti-B antibodies. People with type AB blood are called universal recipients, because they can receive any of the ABO types. People with type O blood are called universal donors, because their blood can be given to people with any of the ABO types.
Previous (Social learning) Next (Social movement) Social mobility is the movement of the members of a particular society in terms of their social status, usually defined in terms of occupation and income (vertical mobility), or from one social group to another, not necessarily with concomitant change in social position (horizontal mobility).
Structural mobility is a kind of vertical mobility. Structural mobility refers to mobility which is brought about by changes in stratification hierarchy itself. It is a vertical movement of a specific group, class or occupation relative to others in the stratification system. It is a type of forced mobility for it takes place because of the structural changes and not because of individual attempts. For example historical circumstances or labor market changes may lead to the rise of decline of an occupational group within the social hierarchy.