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Landscape Research lists the types of migration as labor, forced, international, internal, voluntary and inter-regional migration. Animals and birds normally migrate due to changes in environmental conditions and the nee... More »

www.reference.com World View Social Sciences

The eight types of blood are A negative, A positive, B negative, B positive, AB negative, AB positive, O negative and O positive. The type of blood a person has depends on whether or not two different antigens are presen... More »

www.reference.com Science Human Anatomy Blood

Examples of the types of human adaptation include the development of legs and feet, lactose intolerance and skin pigmentation. Each of these adaptations manifested as a result of evolution. More »

www.reference.com World View Social Sciences Anthropology
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The main causes of urban problems include unemployment, rural-urban migration and the embezzlement of funds. These issues lead to different problems in one way or another. More »

www.reference.com World View Social Sciences

Polo y servicio was a practice employed by Spanish colonizers for over 250 years that required the forced labor of all Filipino males from 16 to 60 years old for 40-day periods. The workers could be placed on any project... More »

www.reference.com World View Social Sciences

Unemployment causes widespread poverty, increased crime rates, political instability, exploitation of labor and reduced economic development in the society. Unemployment may also lead to psychological problems, such as m... More »

www.reference.com World View Social Sciences

Racism, violence in schools, drug abuse, unemployment, hunger and unfair labor conditions are examples of social issues in the United States. Typically, social issues result from factors beyond an individual's control an... More »

www.reference.com World View Social Sciences