Before the 1970s, researchers believed that formal operational thought ____
does not develop in many cultures, particularly in cultures that do not have formal schooling
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develops much sooner than Piaget proposed, closer to age 9
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develops much faster in girls than in boys because of social- emotional maturity
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only develops in the United States, and for unknown reasons it does not develop in other industrialized nations
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does not develop in many cultures, particularly in cultures that do not have formal schooling
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What do twin and adoption studies indicate about the role of genes in body weight?
A) Genes account for between 50% and 90% of the variation in body weight. B) Genes account for a moderate 15–20 % of the variation in body weight. C) Genes only account for 5–10 % of the variation in body weight. D) Body weight is not influenced by genes.
According to Tinbergen, what behavior is likely to occur when a male stickleback fish sees a red spot on the belly of another stickleback?
a) eating b) a threat display c) an attempt to mate d) a courtship "dance"