Which of the following can produce a powerful feeling of euphoria ("rush") accompanied by a reduction of anxiety, relaxation, and pain relief with higher doses impairing breathing and causing death?

A photograph of a cell's chromosomes arranged in pairs according to size is referred to as a:

a. phenotype b. karyotype c. chromotype d. genotype

Adderall and Ritalin are used to treat attention deficit/hyperactivity disorder (ADHD) with both drugs being mixtures of

a. amphetamines. b. barbiturates. c. sedative-hypnotics. d. tranquilizers.