All of the following were pre-columbian civilizations in mexico, except a. the olmec b. the inca c. the aztec d. the maya

At which point on the diagram do convection currents occur to drive plate movement?

Read the article about the fraser river, one of the most important rivers in canada. what is the most important species of fish in this river? why are the numbers of these fish declining?

In upholding louisiana's separate car act, the supreme court claimed thatsegregation was not the same as discriminationthe fourteenth amendment did not apply to southern statesdiscrimination was necessary in order to maintain public ordero segregation was unconstitutional based on the fourteenth amendment