During the first four days following conception, the structure of 60 to 80 cells is called the
a. homo spherical.
b. blobonoidal entity.
c. blastocyst.
d. zygotenoid.
C
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The Marijuana Tax Act of 1937 was successful in reducing the legal disbursement of marijuana
a. True b. False Indicate whether the statement is true or false
Why is levo-alpha-acetylmethadol sometimes used as a substitute for methadone?
a. it has longer-lasting effects b. it is not an opiate c. it is less expensive d. it is more effective
When two autistic boys were ignored after instances of self-destructive behavior, their tendency to injure themselves disappeared. The operant principle employed was
a. negative reinforcement. b. stimulus control. c. nonreinforcement. d. reciprocal inhibition.
Which of the following intellectual abilities seems to be the most sensitive to the effects of a
child's home environment? a. Arithmetic b. Vocabulary c. Block design d. Picture arrangement e. Digit design