A man who is a chronic heavy drinker faces the risk of fathering children with birth defects.
a. true
b. false
a. true
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Which statement is an example of a downward counterfactual?
A. If the tornado's path was different, there would have been less damage. B. If the house was sturdier, the tornado wouldn't have blown the roof away. C. If the tornado was stronger, the sirens would have sounded sooner. D. If the tornado had hit seconds earlier, we would have all died.
Parkinson's symptoms appear when ______ of the nerve cells in the substantia nigra are damaged.
A. 25% B. at least 50% C. at least 75% D. 100%
ACTIVATION is to INHIBITION as ____ is to ____
a. OVUM :: SPERM b. LOGIC :: INTUITION c. MOTION :: RESTRAINT d. REHEARSAL :: ELABORATION
On a variable-ratio schedule, reinforcement is given for the ______
a. first correct response after a fixed amount of time has passed b. first correct response after varying amounts of time have passed c. next correct response after a fixed number of responses have occurred d. next correct response after a varying number of responses have occurred