Race

Answer the following:  

1. Discuss reasons why the definition of race and ethnicity in the U.S. have changed from a definition based on physical descriptors to one based on social and political factors.( minimum 60 words)
2.  Why do racial categories differ from country to country and throughout the history of the U.S.?(Min 60 words)
3. How can knowing about our own race assist in our perception of other people?( min 60 words