Which biological event directly results in the growth of a penis in a male fetus?
a. Receiving a Y chromosome at conception
b. Secretion of testosterone by the testes
c. Absence of the release of female hormones
d. The presence of a gene on the X chromosome
b
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Followers of emperor Shen Nung at around 2800 B.C. used marijuana for __________
a. its psychoactive effects b. to counter the influence of evil spirits c. its sedative properties d. all of these e. its psychoactive effects and sedative properties
The prelinguistic phase in infancy ends when the child
a. utters her first meaningful words. b. succeeds in toilet-training. c. walks without assistance. d. first shows signs, however indirectly, of using grammar.
Watson's experiment with Little Albert demonstrated that fears might be _____
A) based on classical conditioning B) deeply rooted in the innate unconscious of infants C) based on the principle of observational learning D) based on instinctive drift
For the following scores, ?(X + 1)2 = 81. Scores: 1, 3, 0, 1
Indicate whether the statement is true or false