All of the following are part of human systems except. cities

Economies

landforms

religions

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?

Spanish for "estate," this was a type of plantation or other economic activity in spain's "new world" colonies.

Which of the following best describes elizabeth cady stanton and susan b. anthony? o two women who formed the national woman suffrage association o the first two american women to hold national elected office o two women who formed the american abortionist movement the first two american women to vote legally in a national election