Which statement about dizygotic twins is true?
A. They have the same genetic makeup.
B. They result from a zygote that separates into two clusters.
C. They are the most common type of multiple offspring.
D. They are more genetically alike than ordinary siblings.
Answer: C
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A woman is considered ready to deliver a fetus
a. when she begins having Braxton-Hicks contractions. b. when the cervix is effaced and dilated to 10 centimeters. c. as soon as the amniotic sac has ruptured. d. when she reaches stage 3 of childbirth.
A reinforcer works best when it follows the behavior immediately
a. True b. False Indicate whether the statement is true or false
Which of the following is NOT a common side effect of punishment?
a. escape learning b. avoidance learning c. aggression d. accelerated extinction
When Thom and Erik's deceasedmother left millions to the animal shelter and nothing to
them, they were bothvery angry and hurt. Thom wrote a sad song that he performed on stage. Erik kept commenting on his love and affection for their mother. Thom exhibited the Freudian defense mechanism of __________, while Erik exhibited __________ . a. reaction formation; projection b. rationalization; denial c. repression; conversion d. sublimation; reaction formation e. denial; reaction formation