Compared with identical twins,fraternal twins are ________ similar in neuroticism and ________ similar in extraversion.

A) more; less
B) less; more
C) more; more
D) less; less

The libido in both men and women is biologically influenced by the hormone oxytocin.

Evidence shows that people who go on "crash diets" and lose weight tend to return surprisingly rapidly to their starting weight as soon as they go off the diet. Also, dieters do not seem to lose nearly as much weight as one might expect based on caloric intake alone. These findings provide support for the idea of genetically determined bodily __________.

A) glucoreceptors
B) neuropeptides
C) potentiators
D) set points

Classical conditioning was accidentally discovered by Russian physiologist Ivan Pavlov while he was studying salivation in dogs.

According to Piaget, in which stage are children aware of rules and see them as sacred and unalterable?

A) morality of constraint
B) inductive reasoning
C) moral identity
D) concrete operations

Babies are considered preterm if they are ______.

A) born at least 3 months prior to their due date
B) born before their due date
C) almost full term but have experienced slow growth
D) smaller than expected for their gestational age