According to the video “The Biology of Skin Color”, why is lighter skin needed in areas closer to the north and south poles where UV rays are weaker? A. Individuals with a lot of melanin would get too much UV ray penetration in their skin and they wouldn't be able to synthesize vitamin D. B. Lighter skin is not necessary in the north and south poles. C. Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin B. D. Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin D.

According to the video “The Biology of Skin Color”, why is lighter skin needed in areas closer to the north and south poles where UV rays are weaker? A. Individuals with a lot of melanin would get too much UV ray penetration in their skin and they wouldn't be able to synthesize vitamin D. B. Lighter skin is not necessary in the north and south poles. C. Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin B. D. Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin D.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter28: Animal Tissues And Organ Systems

Section: Chapter Questions

Problem 2CT

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According to the video “The Biology of Skin Color”, why is UVB critical for humans? A. It helps our bodies break down Vitamin D, which can be toxic to our bodies. B. It helps our bodies synthesize Vitamin C, which we need in order to absorb calcium in our diet. C. UVB is not critical or useful for us. D. It helps our bodies synthesize Vitamin D, which we need in order to absorb calcium in our diet.
According to the video “The Biology of Skin Color”, how does skin color throughout the world match up with UV exposure? A. Lighter skin is usually found in high UV areas while darker skin is usually found in low UV areas B. Skin color throughout the world does not match up with UV exposure C. Darker skin is usually found in high UV areas while lighter skin is usually found in low UV areas D. UV rays are the same throughout the world, so there is no pattern or correlation with skin color
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