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 wouldn't get enough UV ray penetration in their skin to synthesize vitamin B. B. Lighter skin is not necessary in the north and south poles. C. 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. D. Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin D.

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 wouldn't get enough UV ray penetration in their skin to synthesize vitamin B. B. Lighter skin is not necessary in the north and south poles. C. 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. D. Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin D.

Comprehensive Medical Assisting: Administrative and Clinical Competencies (MindTap Course List)

6th Edition

ISBN:9781305964792

Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy Correa

Publisher:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy Correa

Chapter33: Nutrition In Health And Disease

Section: Chapter Questions

Problem 9CR

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Which statement below best describes whether or not there is an advantage of using iPSCs to induce repair of bodily damage within a patient over using embryonic stem cells that have been donated? a. Because the iPSCs originated from the patient and thus probably will avoid rejection by the patient’s own immune system. b. Embryonic stem cells are easier to obtain. c. There are more ethical issues involved in iPSCs. d. Only embryonic stem cells are vastly renewable.
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	A.	Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin B.
	B.	Lighter skin is not necessary in the north and south poles.
	C.	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.
	D.	Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin D.