EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Textbook Question
Chapter 27.6, Problem 3CC
WHAT IF? Which came first, the chicken or the egg? Explain, basing your answer on evolutionary principles.
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Students have asked these similar questions
1 - Consider natural selection and biocultural evolution. Why do you think anatomically modern humans were more reproductively successful than other contemporary hominins? Or were they?
2 - Why do you think such a small portion of Neandertal or Denisovan DNA exists in the gene pool of modern humans? Why not more?
3 - How might have anatomically modern humans avoided waiting tens of thousands of years for advantageous mutations to pop up that would allow them to adapt to all of these new environments they encountered as they dispersed across the Old World? What might have been a faster way for them to adapt to these environments that the groups who were already in the region had already adapted to?
4 - How does admixture between different regionally adapted populations increase a species chances of survival?
5 - How might the removal of a regionally adapted population make a species more susceptible to extinction?
Thinking Critically
How is evolution by natural selection thought to work?
Evolution Basics
Which of the following things are likely to cause evolution in a population? Try to keep all causes of evolution in mind.
The thickness in fur coat for particular small mammal is determined by the average temperature in its environment. Over time, the environment gets warmer.
A mutation introduces a new wing color in a group of butterflies.
A flood washes away 3/4 of a population of ground squirrels.
Individuals migrate between 2 populations that have the same gene pool.
Within a lizard population, there is genetic variation in the length of the tail. The neighborhood cats chase the lizaards, and have an easier time catching the ones with long
tails.
Chapter 27 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 27.1 - Prob. 1CCCh. 27.1 - Prob. 2CCCh. 27.2 - What is the Cambrian explosion? Why is it...Ch. 27.2 - Prob. 2CCCh. 27.3 - Prob. 1CCCh. 27.3 - WHAT IF? Would it be accurate to describe the...Ch. 27.4 - Prob. 1CCCh. 27.4 - Describe two key adaptations of aquatic...Ch. 27.4 - MAKE CONNECTIONS The radiation of bilaterians in...Ch. 27.5 - Describe two adaptations that have enabled insects...
Ch. 27.5 - MAKE CONNECTIONS Compare and contrast how the...Ch. 27.6 - Describe three key amniote adaptations for life on...Ch. 27.6 - Prob. 2CCCh. 27.6 - WHAT IF? Which came first, the chicken or the egg?...Ch. 27.7 - Describe how ocean communities changed in the...Ch. 27.7 - Prob. 2CCCh. 27.7 - Prob. 3CCCh. 27 - Prob. 1TYUCh. 27 - Fossil steroid and molecular clock evidence...Ch. 27 - Which of the following was probably the least...Ch. 27 - Prob. 4TYUCh. 27 - Prob. 5TYUCh. 27 - Prob. 6TYUCh. 27 - Prob. 7TYUCh. 27 - FOCUS ON EVOLUTION In Figure 27.29, circle the...Ch. 27 - FOCUS ON ORGANIZATION Early tetrapods had a...Ch. 27 - SYNTHESIZE YOUR KNOWLEDGE Collectively, do these...
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- INTERPRET DATA Which of the primates in Figure 18-18 is the most distantly related to humans? Explain your answer. Figure 18-18 Differences in DNA nucleotide sequences as evidence of evolutionary relationships Comparing the same gene in different organisms provides a window into evolution. Here the differences in the non-protein-coding region of the -globin gene are compared between humans and other primates. Evolutionary biologists are rapidly expanding such studies from comparing one or several genes to comparing entire genomes.arrow_forwardHello! I have a discussion tommorow with my classmates, and the prompt says like this: Discuss whether changes to an organism's physical environment are likely to result in evolutionary change. Use examples to support your reasoning. Second, using at least two examples, explain how the process of evolution is revealed by the imperfections of living organisms.arrow_forward25. Answer the following questions based on the facts and inferences related to natural selection that we discussed in class, as well as the simulations you performed with the Evodots lab. If individuals vary, and variation affects survival and reproduction, and variation is heritable: there will be natural selection resulting in evolution. there will be no natural selection, but there will be evolution due to natural selection. there will be natural selection, but it will not result in evolution. there will be no natural selection, and there will be no evolution due to natural selection. 24. Answer the following questions based on the facts and inferences related to natural selection that we discussed in class, as well as the simulations you performed with the Evodots lab. If individuals vary, and variation affects survival and reproduction, but variation is not heritable: there will be natural selection resulting in evolution. there will be no natural selection, but…arrow_forward
- Quiz 10 pts Evolution Quiz 1 Points MULTIPLE CHOICE Question 2 Which of the following statements summarizes Darwin's theory of evolution by natural selection? A The strongest and fastest organisms of a species survive and reproduce. Organisms born with with beneficial adaptations pass these adaptations on to future generations. An organism changes its DNA to suit its environment, and then it passes those genes along to offspring. Animals teach their offspring how to survive their environment. Al Changes Sav eredarrow_forwardAre humans still evolving as species? Please think about the story of human evolution uncovered through genetic studies, and possible evidence that the evolution of our species continues. (essay type preferably 1100 words or more if possible..used as basis for academic research)arrow_forwardQ:need help with question We looked at how the beliefs of the Theory of Special Creation were challenged by Descent with Modification. Even before Lamarck and Darwin proposed that species do change over time, what belief of the Theory of Special Creation had already been challenged? Species do not change Lineages do not split Each species is separately created Each species is independently created Earth and life are youngarrow_forward
- Many misconceptions about evolution • Evolution makes organisms perfect/better • Evolution is heading to some ultimate goal • One organisms turns into another organism in a linear fashion • A single organism can evolve • Evolution is randomarrow_forwardWhich of the following situations will lead to natural selection? The seeds of two plants land near each other and one grows larger than the other Two types of fish eat the same kind of food, and one is better able to gather food than the other Male lions compete for the right to mate with females, with only one possible winner all of the abovearrow_forwardGenetic variation is evident. The variation in your community is simple evidence of understanding the basics of evolution. How does this imply the existence of evolution? Does this mean that some humans are more evolved than others?arrow_forward
- Thinking about Natural Selection and Adaption, what if instead the predators were 4 different spoons: ¼ teaspoon, 1 teaspoon, 1 tablespoon, and 1 large serving spoon? Then what if each time beans (the prey) were captured, they had to be immediately emptied into a narrow-necked jar (with an opening about the size of 1 teaspoon)? What do you think the outcome of the experiment might be in this new situation? (Which “predator” will be the most successful, which the next most, etc. down to the least successful, and why?) Be sure to explain your reasoningarrow_forwardEvolution Question: Who are the fossils “Ardi” and “Lucy”? Elaborate on the roles each played in the reconstruction of human evolutionary history?arrow_forwardEvolution in Humans 1) explain what evolutionary mechanisms are involved in creating variation in populations 2) define homology and analogy and discuss examples of eacharrow_forward
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