Which of the following statements is true about sexual orientation?
A) Adoptive relatives are just as likely as biological relatives to share a homosexual orientation.
B) Male homosexuality tends to be more common on the paternal than the maternal side of families.
C) The evidence to date suggests that genetic and prenatal biological influences are largely responsible for homosexuality.
D) One gene-mapping study found that among 40 pairs of homosexual brothers, 82 percent had an identical segment of DNA on the Y chromosome.
C
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A property of measurement in which assigning a score of zero indicates an absence of the variable being measured is ______________; only __________ measurement scale has this property.
A. identity; nominal
B. magnitude; ordinal
C. equal unit size; interval
D. absolute zero; ratio
Jean Piaget is noted for his theory of
a. cognitive development. b. perceptual development. c. language development. d. motor development. e. moral development