Biology: The Unity and Diversity of Life (Looseleaf)
15th Edition
ISBN: 9781337408417
Author: STARR
Publisher: CENGAGE L
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Chapter 14, Problem 3DAA
Summary Introduction
To determine: The country whose native people have the darkest skin.
Introduction: Melanosomes in skin synthesize melanin pigment and account for the human skin color. Melanin pigment accounts for dark skin color. More melanin pigment provides protection against UV radiations and reflects less light. The inter-individual variation is seen in skin colors due to differences in cellular distribution of melanosomes and the amount of melanin they form.
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Describe the relationship between melanin and UV light exposure in the human population. Include a description of both the effects of UV light on a person and function of melanin.
Consider the three types of human hair. Then, click and drag each label into the appropriate category.
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Male facial hair
Terminal (1/3)
Downy (2/3)
Vellus (3/3)
90% of the hair
on women
Most of the hair
on children
except
eyebrows,
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What is the only statement that correctly identifies the ability of different wavelengths of UV light to penetrate the human skin?
Note: UVA is the longest wavelength (least energy), and UVC is the shortest wavelength (most energy). If you've studied the electromagnetic spectrum you may remember that wavelength and energy have an inverse relationship. We'll talk more about this later in the course.
Group of answer choices
A- UVA light penetrates only as deep as the epidermis, which is where it has its effect
B-UVB light penetrates only as deep as the epidermis, which is where it has its effect
C-UVC light penetrates only as deep as the epidermis, which is where it has its effect
Chapter 14 Solutions
Biology: The Unity and Diversity of Life (Looseleaf)
Ch. 14 - Prob. 1DAACh. 14 - Prob. 2DAACh. 14 - Prob. 3DAACh. 14 - Prob. 4DAACh. 14 - Prob. 5DAACh. 14 - Prob. 1SQCh. 14 - Pedigree analysis is necessary when studying human...Ch. 14 - A recognized set of symptoms that characterize a...Ch. 14 - Prob. 4SQCh. 14 - A trait that is present in a male child but not in...
Ch. 14 - Choose the statement that is incorrect. a. A son...Ch. 14 - Prob. 7SQCh. 14 - Prob. 8SQCh. 14 - Klinefelter syndrome (XXY) can most be easily...Ch. 14 - Prob. 10SQCh. 14 - Does the phenotype indicated by the red circles...Ch. 14 - G6PD deficiency is an X-Linked recessive disorder....Ch. 14 - Marian syndrome (Section 13.5) is inherited in an...Ch. 14 - Duchenne muscular dystrophy, which is inherited in...Ch. 14 - Human females have two X chromosomes (XX); males...Ch. 14 - A mutation on an autosome causes a particular...Ch. 14 - Expression of the SRY gene on the Y chromosome...Ch. 14 - The somatic cells of most individuals with Down...Ch. 14 - Mutations in the genes for clotting factor VIII...
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