According to the opponent-process theory of color vision, the correct pairings of opposite colors are
a. red versus green and blue versus yellow.
b. black versus gray and white versus colored.
c. blue versus red and green versus yellow.
d. blue versus green and red versus yellow.
e. grey versus black and green versus blue.
a. red versus green and blue versus yellow
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Gender segregation among children has been found in every culture where children are allowed to choose their playmates
Indicate whether the statement is true or false
Which of the following statements is true regarding prenatal sex differentiation?
A) Sex differentiation begins at around 4 to 8 weeks of gestation. B) If androgens are present, female genitalia develop regardless of the chromosomal makeup of the fetus. C) In the absence of the SRX gene, an XY fetus will develop female genitalia. D) The absence of a Y chromosome will ensure the development of male genitalia.