Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 13, Problem 1CTS
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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What 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 ?
Do mutations always lead to evolution?
Yes, because mutations create adaptations that give a competitive advantage.
No, because most mutations lead to death of the organism.
Yes, because there would be no change in populations without mutations.
No, because some mutations happen in body cells, so they are not passed on.
How might an evolutionary biologist explain why a species of salamander becomes blind after colonizing a cave?
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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.
Chapter 13 Solutions
Biology: Science for Life with Physiology (5th Edition)
Ch. 13 - How many different species have been identified by...Ch. 13 - Plants experienced an adaptive radiation after the...Ch. 13 - How are hypotheses about the evolutionary...Ch. 13 - Which of the following kingdoms or domains is a...Ch. 13 - Comparisons of ribosomal RNA among many different...Ch. 13 - On examining cells under a microscope, you notice...Ch. 13 - The mitochondria in a eukaryotic cell ___________....Ch. 13 - Prob. 8LTBCh. 13 - Prob. 9LTBCh. 13 - Phylogenies are created based on the principle...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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_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_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_forward
- In the study of human nature, what is the meaning of the acronym WEIRD? People who are Western, Educated, Industrialized, Rich, and Democratic are the most cooperative people in the world. O People who are White, Elderly, Informed, Rich and Dead (like Marx, Darwin, and Kropotkin) have been among the most influential authors on the topic of human cooperation. O People who are Western, Educated, Industrialized, Rich and from Democratic countries are NOT representative of all humanity, yet they are oversampled in studies of human behavior. People who are Western, Educated, Industrialized, Rich and from Democratic countries hold most of the political power in the world, and so they are the least cooperative people.arrow_forwardIn what ways does evolution depend on transfer of information? In what ways does transfer of information depend on evolution?arrow_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_forward
- Some 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_forward1. a) How does this experiment demonstrate the definition of evolution? b) Fitness of organisms is a function of the environment (that is, organisms best fit to the local environmental conditions leave more surviving offspring). How does this experiment demonstrate this fact?arrow_forwardIn this discussion, you will discuss the social issues related to evolutionary theory and its common misconceptions. One of the major social issues is how evolutionary theory should be taught. Some people think that evolution should be presented as one of many theories, including creationism. Other people think that evolution should be presented as the only explanation for the change in Earth’s species over time. What do you think? Use your scientific knowledge to support your position.arrow_forward
- If we lived in a world without mutation, then we will not have evolution. 1)True 2)Falsearrow_forwardIf this model continues, with no major changes to the environment, what do you expect to happen? A) rabbits will continue to get lighter over time B) there is no way to predict because mutations are random C) mutations will all die out leaving only the original fur color D) dark gray fur will become the common phenotype because it favors survivalarrow_forwardBackground: In class we did a project about m and m’s and there ability to evolve and natural selection. (Yes I know they can’t actually evolve it was just used as a example in class) however I can’t figure out this question. Occasionally a mutant may occur and produce a candy that is misshapen or Pointier or flatter than the rest. Often this proves to be a weakness, but a rare mutation may confer extra M&M durability. Other mutations in M&Ms could occur ( like ones that result in a new color). A mutant un you population represents a new _________. What goes in the blankarrow_forward
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