Campbell Biology: Concepts & Connections, Books a la Carte Edition (9th Edition)
9th Edition
ISBN: 9780134442778
Author: Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan, Jane B. Reece
Publisher: PEARSON
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Chapter 19, Problem 14TYK
Summarize the hypotheses that explain variation in human skin color as adaptations to variation in UV radiation.
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Based on everything that you have learned so far, provide an explanation for how the different shades of skin color from pinkish white to dark brown evolved throughout human history.
How is the diversity in human skin color related to human environmental adaptation?
Give only typing answer with explanation and conclusion
Identify the role of natural selection in the evolution of skin color. What role does folate and vitamin D have? How do they differ? How can someone maximize folate and vitamin D levels? Does natural selection still relate to skin color in human populations? If so, how would you expect human skin color to change in human populations in the future?
Chapter 19 Solutions
Campbell Biology: Concepts & Connections, Books a la Carte Edition (9th Edition)
Ch. 19 - Connecting the Concepts 1. In the primate...Ch. 19 - Connecting the Concepts 2. In the chordate...Ch. 19 - A lamprey, a shark, a lizard, and a rabbit share...Ch. 19 - Why were the Tiktaalik fossils an exciting...Ch. 19 - Fossils suggest that the first major trait...Ch. 19 - Which of the following correctly lists possible...Ch. 19 - Which of these is not a member of the anthropoids?...Ch. 19 - Studies of DNA support which of the following? a....Ch. 19 - The earliest members of the genus Homo a. had a...Ch. 19 - Compare the adaptations of amphibians and reptiles...
Ch. 19 - Birds and mammals are both endothermic, and both...Ch. 19 - One of the misconceptions about human evolution is...Ch. 19 - What adaptations inherited from our primate...Ch. 19 - Summarize the hypotheses that explain variation in...Ch. 19 - A good scientific hypothesis is based on existing...Ch. 19 - Explain some of the reasons why the human species...Ch. 19 - Anthropologists are interested in locating areas...Ch. 19 - SCIENTIFIC THINKING By measuring the fossil...
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- Explain the roles of Vitamin B and Vitamin D in the evolution of skin color. Use appropriate anthropological terms (such as "natural selection" and "phenotype") Be sure to discuss both Vitamin B folate and Vitamin D as they have different effects?arrow_forwardAccording to Nina jablonski's research dark skin is adaptive because it protects from __________ at low latitudes. Light skin is a derived trait at high latitudes to allow for __________ production.arrow_forwardWhat factors caused the correlation between the reduction in skin pigmentation in humans and migration of human populations away from the equator? The exposure of human populations to predators only common to the polar regions caused them to adapt by camouflaging better with the environment. The exposure of human populations to less UV light required a reduction in melanin to produce more vitamin D for healthier bones. The exposure of human populations to new sources of food common to the polar regions caused changes in physiology that resulted in the production of less melanin. The exposure of human populations to new diseases common to the polar regions interferred with melanin production causing lighter skin.arrow_forward
- What is the evidence that the differences in skin color in populations around the world evolved by natural selection?arrow_forwardoriginal Homo sapiens had black skin and why skin tones changed?arrow_forwardCan the effects of UV light on the folate explain the full variation of human skin color that exists among human populations today? Expain your reasoning.arrow_forward
- Why is it that the evolution of skin color is considered a case of natural selection? Group of answer choices A- Because different alleles in skin color genes lead to differences in skin color B- Because differences in skin color lead to differences in number of children in different environments C- Both D- Neitherarrow_forwardUse logic to deduce the answer to this question. Given what you know about skin color and skin cancer, the highest rate of skin cancer on Earth occurs among (a) blacks in tropical Africa, (b) scientists in research stations in Antarctica, (c) whites in northern Australia, (d) Norwegians in the United States, (e) blacks in the United States.arrow_forwardWhich factors were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection? the impact of UV radiation on folate and Vitamin D levels in human populations the clothing worn by humans in the early 8th century the interaction of human populations with predators in colder climates a change in the diet of human populations as they settled in colder climatesarrow_forward
- Human populations living in countries in the northern latitudes, such as Finland, have a lighter complexion than people living in the tropical countries. What do you think is the reason for this difference?arrow_forwardWhich of the following decreases the evolutionary fitness in people with darker skin color? Assume there is no dietary supplementation. A_ Low folate in areas with high UV B_ Low folate in areas with low UV C_Low vitamin D in areas with high UV D_Low vitamin D in areas with low UVarrow_forwardWatch the film from time stamp 5:49 minutes to 9:08 minutes. Pause when Dr. Jablonski says, “That suggests that variation in human skin melanin production arose as different populations adapted biologically to different solar conditions around the world.” III. After watching this segment of the film, answer Question 10. 10. Based on what you know about skin pigmentation so far, suggest a mechanism by which UV intensity could provide a selective pressure on the evolution of human skin color. In other words, propose a hypothesis that links skin color to evolutionary fitness. IV: What Was the Selective Pressure? Watch the film from time stamp 9:08 minutes to 12:19 minutes. Pause when Dr. Jablonski says, “For that reason, though it might cut your life short, it’s unlikely to affect your ability to pass on your genes.” After watching this segment of the film, answer Questions 11–12. 11. What does it mean for a trait, such as light skin coloration, to be under…arrow_forward
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The Evolution of Humans | Evolution | Biology | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=Vf_dDp7drFg;License: Standard YouTube License, CC-BY