When did early humans begin to use bows and arrows for hunting? A. the Historic Age
B. the Paleolithic Age (Old Stone Age)
C. the Mesolithic Age
D. the Neolithic Age (New Stone Age)

Explain at least three factors economists consider the measurement of success, or shortcomings, of the economy? and give examples.

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?

Steven pinker states that an important difference exists between men and women in: