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8 Cards in this Set
- Front
- Back
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How does a biologist define "race?"
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-Race is a geographically isolated subdivision of a species or subspecies--though there is no biologically accepted definition.
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Do human "races" exist?
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-Early human classification into races have been dependent solely on the evaluation of phenotype (appearance, skin color, hair texture, etc.)
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What amount of human genes account for the phenotypical differences seen between "races?"
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-6%
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What is skin color a function of?
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-melanin production in the dermis layer of the skin.
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Differences in the appearances of human groups is an example of ____ ____.
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-convergent evolution
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What is the protective function of skin pigmentation?
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-protection of cell DNA from UV damage
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What is the benefit of Vitamin D?
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-the human body synthesizes it in the skin with the help of ultraviolet radiation.
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What are the dangers of Vitamin D?
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-too much Vitamin D is toxic; too little will result in debilitating bone disease.
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