Racial and ethnic groups are socially constructed categories distinguished by physical characteristics. While biology plays a role through phenotypes like skin color, race is also a social construct. Ethnicity refers more to cultural traits like language and religion. Minority groups have less power and control than dominant groups in a society. Stereotypes are exaggerated beliefs about groups that often develop from fear or a threat to the dominant group. Prejudice involves negative attitudes toward others based on characteristics. Discrimination involves actions that exclude or oppress groups. Racism includes beliefs of inherent superiority and the subjugation of others. Integration aims for equality, while assimilation requires abandoning one's own culture. Cultural pluralism values diversity within a society.