The vitamin D hypothesis
A) helps explain why dark-skinned populations are found near the equator.
B) has never been challenged.
C) cannot explain why light skin may be adaptive in low UV environments.
D) remains the primary hypothesis explaining why skin color lightened as populations moved out of Africa.
E) helped Pasteur to discover the process of homogenization
Correct Answer:
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Q15: Which of the following contributes most to
Q16: Biological systems are balanced systems maintained by
Q17: Vasodilation
A)reduces heat loss at the skin's surface.
B)can
Q18: Stresses imposed by living at high altitudes
Q19: Melanocytes
A)are cells that produce carotene.
B)cause skin cancer.
C)only
Q21: Skeletal biologists who study disease and trauma
Q22: _ provides the best-documented example of evolution
Q23: _ is the most common category of
Q24: The most interesting fact about human skin
Q25: Infectious diseases
A)affect only children and infants.
B)are associated
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