The first genetically engineered product to be approved for human use was ______made in bacteria

What percentage of North American children have at least one dental cavity by age five years?

a. 5% b. 10% c. 20% d. 40%

The type of psychological approach which has become predominant in the treatment of

sleep disorders is ______. a. social learning therapy c. psychoanalysis b. cognitive-behavior therapy d. humanistic therapy