A variable that can be measured only with a finite set of values is a ______ variable

In __________________ based addictions, the body becomes so accustomed to functioning in the presence of a drug that it cannot function without it.

A. psychologically B. physiologically C. environmentally d. socially

Suzanne is 16, her younger sister Ellen is 13, and the two girls are as different as night and day. Suzanne is impulsive, short-tempered, and generally hard to get along with, at least from her parents' point of view, although she is very popular with adolescents of her own age. Ellen is typically quiet and pensive, much more interested in school studies than in her peers and generally reserved

around other people. (a) How do the girls rate on the introversion/extraversion scale? (b) In terms of genetics, how might the girls be so different? (c) In terms of environment, how might the girls be so different? What will be an ideal response?