East Asians who have migrated recently from India and Pakistan to northern areas of the United Kingdom have a higher incidence of rickets and osteoporosis than the general British population. This illustrates that
A. natural selection continues today.
B. genetic adaptation of environmental stressors can occur within one generation.
C. cultural adaptation provides effective shortcuts to the genetically disadvantaged in a foreign environment.
D. because of global warming, the lack of sunlight that people are exposed to in these northern regions is made up for by the intensity of the sunlight.
E. natural selection's role in determining skin color is a thing of the past, relevant only prior to the sixteenth century when massive migrations of populations altered the geographic distribution of dark-skinned people.
Question 2
The explanations given in this chapter for the differences in and distribution of skin color in populations around the world are examples of
A. punctuated equilibrium.
B. the social construction of so-called scientific categories.
C. attempts at classifying human groups into clines.
D. explanatory approaches to human biological diversity.
E. how having a political interest in justifying racial policies interferes with objective science.
A chest X-ray showing pneumonia characterized by the patch of gray-white areas.
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