Concept explainers
Scientists initially rejected the endosymbiotic theory, which is the hypothesis that eukaryotic cells evolved from a set of cooperating independent cells. Most biologists still believe that competition for
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Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
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- Why is intelligent design (ID) a flawed argument? Select the statement that is FALSE. There is no way through experiments or observations to falsify the hypothesis of an Intelligent Designer. ID assumes that each molecular machinery is built from scratch, which is not true; existing proteins are often re-used. OID and evolution are both valid hypotheses, but over the years we have found more evidence pointing toward evolution. O ID assumes that systems are irreducibly complex, and that individual components cannot be removed, even though several examples exist of 'irreducibly complex' systems being reduced. en 0 3 $ 35 % ^ 6 18 & * 8 9 44 Indoor Playground with wheelsarrow_forwardA species is a group of individual organisms that interbreed and produce fertile, viable offspring. According to this definition, one species is distinguished from another when, in nature, it is not possible for matings between individuals from each species to produce fertile offspring. Evolution is an important mechanism in the formation of new species. The evolution of a new species requires several components including all, BUT A) Evolution of a new species requires a long time. B) Evolution of a new species requires the need for a genetic change. C) Evolution of a new species requires a separation that prevents interbreeding. D) Evolution of a new species requires mutations that produce new genetic traits. not graded use photoarrow_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
- How do advantageous traits lead to evolution? Put the steps in the proper order. advantageous trait → survival of the fittest → natural selection → differential reproduction → evolution advantageous trait → survival of the fittest→ differential reproduction → natural selection → evolution advantageous trait → differential reproduction → survival of the fittest → natural selection → evolution advantageous trait → natural selection → survival of the fittest → differential reproduction → evolutionarrow_forwardDefine evolution: What is decent with modification? Use Mosquitoes and DDT to explain natural selection. What does the term fitness mean in the context of evolution?arrow_forwardIn what ways does evolution depend on transfer of information? In what ways does transfer of information depend on evolution?arrow_forward
- You are discussing the choice of the “oil-eating” bacteria that you will use to clean the affected area from the oil spill and your team wants to know whether the Kalba sea constitutes a natural habitat for these bacteria. Formulate a hypothesis stating why or why not the Kalba sea area can be considered a natural habitat for such bacteria. Support your answer by discussing the role of evolution in contributing to the survival and thriving of “oil-eating” bacteria. Explain how and why these bacteria acquired these characteristicsarrow_forwardAlthough natural selection is sometimes called the survival of the fittest, it is ultimately a process of: a) differential reproduction b) differential consumption c) differential migration d) differential mutationarrow_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
- In 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_forwardDuring a study session about evolution, one of your fellow students remarked “The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result.” Which statement is MOST likely to be helpful in correcting this student’s misconception? Why? * No answer Disuse of an organ may lead to its eventual disappearance. Spontaneous mutations can result in the appearance of new traits. Only favorable adaptations have survival value. Characteristics acquired during an organism’s life are generally not passed on through genes.arrow_forwardSome scientists say that modern medicine and better sanitation are slowing down or altering the course of human evolution in highly developed countries today. As a result, evolution in humans today has gone from survival of the fittest to survival of almost everyone. Do you think that this idea is valid? Why or why not?arrow_forward
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning