Working with Walter Cannon, A.L. Washburn use a balloon to show that feelings of hunger r accompanied by.

Defects that are caused by inherited characteristics are known as

a. congenital problems. b. genetic disorders. c. teratogen defects. d. endogenomic problems.

Every morning at the bus stop, Carlos encounters an old woman begging for change. She is clearly hungry and alone. Because Carlos feels very bad for this woman and can "feel her pain,"

he makes a point of giving her some change each morning that he sees her. Which theoretical approach best explains Carlos's behavior? a. social-exchange theory b. kin selection c. the empathy-altruism hypothesis d. the norm of reciprocity