CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
10th Edition
ISBN: 9780136538820
Author: Taylor
Publisher: INTER PEAR
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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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Watch 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…
In essay form, explain the benefits, effects, and contributions of the five agents of evolutionary change.
Discuss the relationship between the wild animals and their domesticated pets and identify the possible pattern of descent with modification from their common ancestor. (Explain your answer briefly)
Chapter 19 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
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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- Evolutionary Thought: answer the question in essay form. Explain the benefits, effects, and contributions of the Five Agents of Evolutionary Changearrow_forwardConsider the concept of evolution. Give some reasons why it is impossible to evolve perfect organisms through this process.arrow_forwardExplain the pattern of human evolution in reference to tool use and sexual dimorphism.arrow_forward
- Answer with true or false for each statement: A. The Anthropocene is proposed to represent the modern era where human-generated change is extensively modifying global landscapes and climates. b. Theories for the source of common primate characteristics include an arboreal adaptation, and switching the diet from insects to plants and fruits. c. Although there are many bases, DNA ordinarily makes use of only four: guanine and cytocine, and adenine and thymine.arrow_forwardExplain why mutations are necessary for natural selection to produce adaptations.arrow_forwardCompare and contrast the five patterns of natural selection that drive adaptation.arrow_forward
- Explain how adaptations relate to evolutionary change.arrow_forwardApply the concept of natural selection to any given adaptation and suggest a logical explanation of how the adaptation may have evolved.arrow_forwardReview darwin's theory of natural selection. Write a 1-2 paragraph reflection explaining a) what you learn from the evidence of revolution and b.) The connections you made with what you learn about darwin's theory of natural selection and how meet mutations play an important role in the natural selection.arrow_forward
- According to "Homo naledi – New Questions on Human Evolution ", why was it significant that the bones were found to be articulated (their bones hadn’t separated from each other)? A.The individuals arrived in the cave either alive or shortly after the died. B.The individuals had decomposed outside of the cave, and other Homo naledi individuals put their skeletons together inside the cave. C.The bodies must have been placed in bags or coffins to keep the skeleton together as the body degraded. D.None of these are correctarrow_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_forwardWe often observe the evolutionary loss of “useless” organs, such as the eyes in many cave-dwelling animals. a) Provide two different hypotheses to explain this loss: an adaptive and a nonadaptive hypothesis. b) How might these hypotheses be tested? Describe what type of data you would need to collect, or potential experiments.arrow_forward
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The Evolution of Populations: Natural Selection, Genetic Drift, and Gene Flow; Author: Professor Dave Explains;https://www.youtube.com/watch?v=SRWXEMlI0_U;License: Standard YouTube License, CC-BY
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