America's number one drug problem is ______
a. nicotine c. alcohol b. caffeine d. cocaine
C
Psychology
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The optic nerve is composed of ____
a. ?bipolar cells b. ?horizontal cells c. ?ganglion cells d. ?amacrine cells
Psychology
_____ refers to the tendency of growth rates to return to normal after undergoing environmentally induced change
A) Canalization B) Myelination C) Differentiation D) Habituation
Psychology