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Skin Color Survey of Native Peoples In 2000, researchers measured the average amount of UV radiation received in more than fifty regions of the world, and correlated it with the average skin reflectance of people native to those regions (reflectance is a way to measure the amount of melanin pigment in skin: Skin with more melanin is darker, so it reflects less light). Some of the results of this study are shown in F1GURE 14.1 . FIGURE 14.1 Average skin reflectance of people native to ten countries correlated with regional incident UV radiation . Skin reflectance measures how much light of 695-nonometer Wavelength is reflected from skin; UVMED is the annual average UV radiation received at Earth’s surface. According to these data, how does skin color of human populations correlate with the amount or UV radiation incident in their native regions?

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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 14, Problem 5DAA
Textbook Problem
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Skin Color Survey of Native Peoples In 2000, researchers measured the average amount of UV radiation received in more than fifty regions of the world, and correlated it with the average skin reflectance of people native to those regions (reflectance is a way to measure the amount of melanin pigment in skin: Skin with more melanin is darker, so it reflects less light). Some of the results of this study are shown in F1GURE 14.1.

Chapter 14, Problem 5DAA, Skin Color Survey of Native Peoples In 2000, researchers measured the average amount of UV radiation

FIGURE 14.1 Average skin reflectance of people native to ten countries correlated with regional incident UV radiation. Skin reflectance measures how much light of 695-nonometer Wavelength is reflected from skin; UVMED is the annual average UV radiation received at Earth’s surface.

According to these data, how does skin color of human populations correlate with the amount or UV radiation incident in their native regions?

Summary Introduction

To explain: How skin color of human populations correlate with the amount of UV radiation incident in their native regions.

Introduction: Different parts of the earth have variable exposure to UV radiations. The reflectance index is a measure of amount of light energy especially UV radiations absorbed by body per area unit. Melanosomes in skin synthesize melanin pigment and account for the human skin color. More melanin pigment provides protection against UV radiations and reflects less light.

Explanation of Solution

As given in the problem statement, researchers in year 2000 measured the average amount of received UV radiation in more than fifty regions of the world. These data correlated with average skin reflectance of people native to those regions. Refer Fig. 14.1, “Average skin reflectance of people native to ten countries correlated with regional incident UV radiation”, in the textbook...

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