Humans do not need the environmental cues of light and dark (day and night) in order to maintain circadian rhythms.

At work, there is a vending machine that gives extra candy bars when either the "a" or "b" choice is selected. Employees continue to frequent this machine regularly. This best illustrates:

What will be an ideal response?

In negotiating a new roommate's perception of his (David's) personal qualities, David may agree with his new roommate's self-assessment as a(n) ________ because it aids David in "selling" David's view of himself as a(n) ________. Additionally,

David may downplay his own ________. A) gifted athlete; excellent student; athletic accomplishments B) gifted athlete; excellent student; accomplishments in other areas C) gifted "ladies' man"; excellent student; same-sex orientation D) depressed ne'er-do-well; excellent student; unrealistic optimism E) son of a wealthy eastern industrialist; financial-aid student; future plan to ask his new roommate for a loan