Variations In Human Skin Color

16 Questions | By Marshallje | Last updated: Mar 20, 2022 | Total Attempts: 111

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1.

Resource #1 1. What are some traits that people share? Check three.
- A.
  
  Environmental factors like sunlight, temperature and food supply.
- B.
  
  Males and females have similar sexual characteristics with others of their gender.
- C.
  
  Relatives share similarities in appearance due to their common genetic make up.
- D.
  
  People with ancestors from the same regions of the world often share similar physical characteristics like skin, hair color, facial characteristics, body shape, and stature.
2.

2. Besides genetics, what other factors can affect a person’s appearance and growth?
- A.
  
  Exposure to ultraviolet rays (UV) can darken or tan a person’s skin.
- B.
  
  Exposure to ultraviolet rays (UV) can alter genetic characteristics.
- C.
  
  Varying UV causes no impact.
3.

3. Why do sub-Saharan Africans have the same dark skin color as many people in places like southern Asia and Australia? Pick two.
- A.
  
  Environmental factors
- B.
  
  Genetics
- C.
  
  Apparel opportunities
4.

4. How has racial classification been used in North America? Choose three.
- A.
  
  They represent cultural differences in our society.
- B.
  
  They have been used to assign undisclosed information.
- C.
  
  They have been used to enlighten people's awareness.
5.

5. Skin color a good way to classify people, because people respond to their __________________ adaptions.
6.

Resource #2 6. How does melanin determine skin color? Check three.
- A.
  
  Pheomelanin, which is red to yellow in color and is produced by those with light complexions
- B.
  
  Eumelanin, which is dark to black in color and is produced by those with dark-colored skin.
- C.
  
  Melanin causes increased radioactivity.
- D.
  
  People also differ in the number and size of their melanin particles.
7.

7. ________________________ serves as a shield for UV exposure.
8.

8. Besides melanoma, what other conditions does melanin shield against?
- A.
  
  Helps the eyes filter light.
- B.
  
  Helps the body clean bacterial impurities.
- C.
  
  Helps the body maintain healthy folic-acid levels.
9.

9. Some shortwave ultraviolet radiation (UVB) exposure important. What does vitamin D do to assist the body? Choose three.
- A.
  
  Helps in converting oxygen to blood cells.
- B.
  
  Helps the body absorb calcium.
- C.
  
  Helps the body absorb phosphorus.
- D.
  
  Helps in bone growth and repair.
10.

10. Historically, people with darker pigmented skin live with 20 degrees of the _______________________ .
11.

Resource #3 11. Jablonski and Chaplin concluded that modern humans most likely evolved in the __________________, where they were exposed to high UV levels.
12.

12. In what way do Jablonski and Chaplin see skin color as “a balancing act”? Check two.
- A.
  
  Between dietary nutritional needs.
- B.
  
  Between the evolutionary demands of photo-protection
- C.
  
  Between the need to create vitamin D in the skin.
- D.
  
  Between the evolutionary demands of hunter gatherers.
13.

13. Eskimos in Alaska have dark skin, beacuse their traditional _______________ is rich in fish and other seafood, which are high in vitamin D.
14.

14. Are dark-skinned people at an advantage or disadvantage in northern latitudes?
- A.
  
  Advantage
- B.
  
  Disadvantage
15.

15. DNA research has shown that genetically all humans, regardless of skin color and other surface distinctions, are basically the __________________ .
16.

16. Our and many other societies have developed elaborate systems of ________________ and _______________ based on perceived racial differences.
- A.
  
  Privilage
- B.
  
  Respect
- C.
  
  Control
- D.
  
  Education