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Scientists have attacked twins studies before because
(A) the studies artificially bolster the contribution of genes over environment.
(B) more is made of 'nurture' and less of 'nature'.
(C) the effect of 'nature' and 'nurture' is to be looked at skeptically.
(D) both 'nature' and 'nurture' are unrealistic assumptions.
(E) contribution of 'nature' and 'nurture' tend to be inflated.
Ans : A
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The term "has been on a slow boil" in line 40 means
(A) all burnt out
(B) all spilled over
(C) simmering steadily
(D) condensed slowly
(E) bubbled up
Ans : C
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The authors of the Bell Curve argue that
(A) to be successful in life one need not be intelligent.
(B) to be economically successful in life one necessarily requires a high IQ.
(C) a low IQ does not lead to economic success for an individual.
(D) a high IQ need not lead to economic success for an individual.
(E) economic success is related to human IQ levels.
Ans : E
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The mathematical model that best explains the similarities and differences between twins
(A) includes genetic and environmental effects.
(B) assesses genetic, environmental and maternal effects.
(C) concentrates on the maternal effect.
(D) does not negate the maternal effect.
(E) tests the maternal effect.
Ans : B
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Other effects besides the "maternal effect" account for
(A) 80 percent of the IQ similarities between twins and 95 percent of the similarities between other siblings.
(B) 20 percent of the IQ similarities between twins and 5 percent of the similarities between other siblings.
(C) 34 percent of the IQ similarities between twins and 70 percent of the similarities between other siblings.
(D) 70 percent of the similarities between twins and 34 percent of the similarities between other siblings.
(E) none of the IQ similarities between twins and other siblings.
Ans : A
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