Which of these best shows how environmental changes can alter the effects of a gene?

a. Many Asian people learn to avoid excess consumption of milk.
b. Physical exercise improves mental functioning for many people.
c. Brain damage can impair people's ability to recognize faces

At least half of those suffering from anorexia nervosa reduce their weight by:

A. regularly engaging in self-induced vomiting after an episode of binge eating. B. restricting their intake of food. C. abusing laxatives and diuretics. D. exercising excessively.

Whenever a person has two contradictory cognitions at the same time, a state of _______ exists

a. cognitive congruence b. nonreciprocity c. cognitive dissonance d. identity diffusion