Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 22, Problem 16TYU
Summary Introduction
To explain: Whether the idea that evolution in humans has gone from survival of the fittest to survival of almost everyone due to modern medicine and better sanitation is valid or not.
Concept introduction: Human beings are the first animals to undergo organic evolution, cultural and social evolution. Human beings are the highly advanced living organisms because they have greater intelligence and information transmission in the form of knowledge. They are the first animals to treat the diseases they are infected with.
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Evolutionary biologists often say that evolution “selects for outcomes” not for the particular genetic changes that lead to that adaptive outcome. Given that perspective, is it surprising that different gene mutations might be involved in the evolution of the same trait (such as light skin or adaptation to living in high mountains)? Why or why not?
Origins of Modern Humans
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years ago, early modern humans had expanded their range to South Africa and into Southwest Asia (Israel) shortly after 100,000 years ago. There is no reliable
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While the French biologist LaMarck was correct in proposing that evolution does occur, he believed that the long necks of giraffes evolved as generations of giraffes reached for ever higher leaves on the trees. Using these observations, LaMarck proposed the theory that evolution occurs due to the inheritance of characteristics acquired during an organism’s lifetime. From what you know about the scientific method, why is this incorrect?
Chapter 22 Solutions
Biology (MindTap Course List)
Ch. 22.1 - Describe the structural adaptations that primates...Ch. 22.1 - Prob. 1CCh. 22.1 - Prob. 2CCh. 22.2 - Prob. 2LOCh. 22.2 - Distinguish among anthropoids, hominoids, and...Ch. 22.2 - Prob. 1CCh. 22.2 - Prob. 2CCh. 22.3 - Describe skeletal and skull differences between...Ch. 22.3 - Prob. 5LOCh. 22.3 - Prob. 6LO
Ch. 22.3 - Prob. 7LOCh. 22.3 - Prob. 1CCh. 22.3 - Prob. 2CCh. 22.3 - Prob. 3CCh. 22.3 - Prob. 4CCh. 22.3 - Prob. 5CCh. 22.4 - What are the generally recognized cultural stages...Ch. 22.4 - Prob. 1CCh. 22 - Prob. 1TYUCh. 22 - The anthropoids are more closely related to...Ch. 22 - Prob. 3TYUCh. 22 - Prob. 4TYUCh. 22 - Scientists collectively call humans and their...Ch. 22 - Prob. 6TYUCh. 22 - Some scientists now think that fossils identified...Ch. 22 - Prob. 8TYUCh. 22 - ___________ were an early group of humans with...Ch. 22 - The modern human skull lacks (a) small canines (b)...Ch. 22 - Prob. 11TYUCh. 22 - Prob. 12TYUCh. 22 - If you were evaluating whether other early humans...Ch. 22 - Prob. 14TYUCh. 22 - EVOLUTION LINK What was the common ancestor of...Ch. 22 - Prob. 16TYUCh. 22 - Prob. 17TYUCh. 22 - Prob. 18TYU
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- EVOLUTION LINK Write short paragraphs explaining each of the following statements: (a) Natural selection chooses from among the individuals in a population those most suited to current environmental conditions. It does not guarantee survival under future conditions. (b) Individuals do not evolve, but populations do. (c) The organisms that exist today do so because their ancestors had traits that allowed them and their offspring to thrive. (d) At the molecular level, evolution can take place by the replacement of one nucleotide by another. (e) Evolution is said to have occurred within a population when measurable genetic changes are detected.arrow_forwardIs gene transfer a form of eugenics? Is it advantageous to use gene transfer to eliminate some genetic disorders? Can this and other technology be used to influence the evolution of our species? Should there be guidelines for the use of genetic technology to control its application to human evolution? Who should create and enforce these guidelines?arrow_forwardThe concept of evolution has always been connected with some notion of progress–natural selection pushing populations toward better and better adaptations to create "perfect organisms." How would you argue that evolution does not craft perfect organisms?arrow_forward
- Evolution is sometimes characterized as “survival of the fittest.” Is this wording consistent with an evolutionary biologist’s definitions of fitness and natural selection? Is it a good way to think about evolution or a poor one?arrow_forwardWhat are two evolutionary explanations for why certain organisms might NOT blend into their environment (e.g. bright colors,loud songs , or stand out )? Why do you think evolution is sometimes seen at odds with religion ?arrow_forwardIn many ways, modern human lifestyles are at odds with our bipedal locomotion. At no point in history have humans been as inactive as today (especially in developing nations), which has led to a number of physical ailments, such as obesity, loss of mobility, and low back pain. What are some other impacts of evolution on our species? What are some ways we can alleviate these problems? You should include any recommended study tips, review videos, or other materials.arrow_forward
- Why does evolution matter now? List 5 facts of one of the events in the evolution timeline. Focus on what was discovered, how the evidence was found and when scientists learned about these facts.arrow_forwardConsider Lamarck’s idea in a hypothetical situation. For example, you decided that when you have children, you want them to be big ang strong. You decided to go to the gym every day for a year. You did all your exercise routines diligently and you were able to develop really bulky and toned muscles because you believed that your kids would inherit your big impressive muscles. Do you think this would work? Justify your answer using the concepts you have learned from Genetics, as well as Darwin’s concept of evolution.arrow_forwardThe concepts of natural selection and evolution are central to how most biologists understand and interpret the world, and yet the theory of evolution is contrary to the beliefs of many religious groups. Why do you think this theory is so important to science and so strongly opposed by others? What evidence would be required to convince opponents of evolution?arrow_forward
- . The images below show two separate theories of how organisms evolve. Which question below directly corresponds to whether Lamarck or Darwin are correct about their theories of the mechanisms of evolution? Why don’t the shorter neck giraffes feed on grasses and lower vegetation? How would the shorter necked giraffes in Lamarck’s theory survive to reproduce and pass on the “need” for longer necks if they were unable to reach food? Why won’t the taller necked giraffes in Darwin’s theory provide assistance to the shorter giraffes since they are the same species? Will the smaller giraffes be more adapted to hide from predators since they wouldn’t be visible from greater distances?arrow_forwardWith regard to biological evolution, which of the following statements is incorrect? Explain why.A. During its lifetime, an animal evolves to become better adaptedto its environment.B. The process of biological evolution has produced species thatare better adapted to their environments.C. When an animal is better adapted to its environment, the process of natural selection makes it more likely that the animalwill reproduce.arrow_forwardHow might an evolutionary biologist explain why a species of salamander becomes blind after colonizing a cave? Group of answer choices Members of the ancestral population that colonized the cave differed in their ability to see. If maintaining the ability to see in the cave was a waste of energy, blind salamanders might actually have more offspring than those who could see. It is possible that in the cave there is a source of pollution that increases the mutation rate for a gene that makes salamanders blind. Over time, due to exposure to this chemical, the membersof the population lose their sight. There is no way to explain this in terms of natural selection. The members of this salamander species no longer needed to use their eyes. Over time, due to lack of use, they lost the ability to see.arrow_forward
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