Which term refers to a group of human beings whose members identify with one another based on common ancestry and culture?
a) clan
b) minority
c) ethnic group
d) religious group

As our current atmosphere formed, the concentrations of various atmospheric gases fluctuated. match each gas with the explanation that best describes how its proportion changed during the evolution of the atmosphere.

A(n) is an alliance or collection of parties.

When the communist, under mao, took control of china in 1949 they announced total support support for which country and its ideology?