How did early people populate the americas?
1. by crossing a land bridge between siberia and alaska. 2. by crossing the pacific ocean. 3.by crossing the prairies of canada to north america. 4. by crossing the atlantic ocean.

- "ethical issues. deception – the participants actually believed they were shocking a real person and were unaware the learner was a confederate of milgram's. however, milgram argued that “illusion is used when necessary in order to set the stage for the revelation of certain difficult-to-get-at-truths.” "

- "milgram's work was conducted in the early 1960s before the current.the studies ignited a debate about the ethical treatment of participants. what appear to be dangerous, if not deadly, electric shocks and the by today's ethical standards, many questions about the research have gone unanswered."

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.