Normally, Jake is described by his friends as being easy-going and relaxed. However, when he’s under stress, he becomes moody and readily snaps at others. This behavioral tendency for Jake to act outside his normal behavior when he is stressed is called __________.

You're in Hong Kong reading the morning newspaper, and you notice a headline about a double murder that took place overnight. A suspect is in custody. Which of the following headlines is most likely to accompany the story?

a. "Dispute Over Gambling Debt Ends in Murder" b. "Crazed Murderer Slays Two" c. "Homicidal Maniac Stalks Innocents" d. "Bloodthirsty Mobster Takes Revenge"

The fossil evidence indicates that one of the oldest known hominid species, Ardipithecus ramidus, existed over_________ years ago

a. 4.4 million. b. 1.8 million. c. 2.4 million. d. 1.5 million.