Dizygotic twins develop when a fertilized egg divides into two parts that develop into separate embryos

Amanda has lost some money she needs for next semester's tuition. While betting on red, the roulette wheel has come up with five blacks in a row

To try to get her money back, Amanda is now doubling up her bet each time on red, believing that red will come up soon. She bases her belief on the (roughly) 50/50 odds of red and black occurring over a large number of spins of the wheel. Amanda's strategy appears to be based on ________. a) the representativeness heuristic b) the advice of a successful gambler c) a magical thinking perspective d) the availability heuristic

Khalil has been losing weight because he has no interest in eating.He also complains of constipation. Furthermore, he has difficulty falling asleep and then wakes up several times during the night, often because of nightmares. Khalil is experiencing which symptoms of depression?

a. affective c. cognitive b. behavioral d. physiological