Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 24.3, Problem 1CC
- 1. What are hybrid zones, and why can they be viewed "natural laboratories" in which to study
speciation ?
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1. What is the significance of the process of speciation to biological biodiversity?
1) In allopatric speciation, geographic separation of two populations
a.reduces the relative fitness of hybrid offspring.
b.is sufficient for speciation to occur.
c.allows gene flow between them.
d.inhibits gene flow between them.
1. Distinguish between microevolution and macroevolution.2. Hawthorn flies are an example of what kind of speciation? Explain why.
Chapter 24 Solutions
Campbell Biology (11th Edition)
Ch. 24.1 - Prob. 1CCCh. 24.1 - WHAT IF? Suppose two bird species live in a...Ch. 24.2 - Summarize key differences between allopatric and...Ch. 24.2 - Prob. 2CCCh. 24.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 24.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 24.3 - 1. What are hybrid zones, and why can they be...Ch. 24.3 - WHAT IF? Consider two species that diverged while...Ch. 24.4 - Speciation can occur rapidly between diverging...Ch. 24.4 - Prob. 2CC
Ch. 24.4 - MAKE CONNECTIONS Compare Figure 13.12 with Figure...Ch. 24 - Explain the role of gene flow in the biological...Ch. 24 - Can factors that cause sympatric speciation also...Ch. 24 - What factors can support the long-term stability...Ch. 24 - Is speciation something that happened only in the...Ch. 24 - The largest unit within which gene flow can...Ch. 24 - Prob. 2TYUCh. 24 - Prob. 3TYUCh. 24 - Prob. 4TYUCh. 24 - Which of the following factors would not...Ch. 24 - Plant species A has a diploid chromosome number of...Ch. 24 - Prob. 7TYUCh. 24 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 24 - WRITE ABOUT A THEME: INFORMATION In sexually...Ch. 24 - Prob. 10TYU
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- Which situation would most likely lead to allopatric speciation? Flood causes the formation of a new lake A storm causes several large trees to fall down A mutation causes a new trait to develop An injury causes an organism to seek out a new food source.arrow_forward3. Briefly describe allopatric and sympatric speciation and provide a real-world example of each.arrow_forward2. When new species formed because gene flow was blocked by a physical barrier, this is considered... Group of answer choices a.allopatric speciation b.polyploidy c.sympatric speciationarrow_forward
- 1. What is phylogeny? Why is it considered an important field in understanding evolutionary processes? 2. What is the difference between allopatric from sympatric speciation?arrow_forwardIn the model of allopatric speciation, the geographical separation of two populations: a. is sufficient for speciation to occur. b. occurs only after speciation is complete. c. allows gene flow between them, d. reduces the relative fitness of hybrid offspring. e. inhibits gene flow between them.arrow_forwardApply Evolutionary Thinking How do human activities (such as destruction of natural habitats, diversion of rivers, and the construction of buildings) influence the chances that new species of plants and animals will evolve in the future? Frame your answer in terms of the geographical and genetic factors that foster speciation.arrow_forward
- 2) In some Drosophila species, conditions in the female reproductive tract do not allow the sperm of other species to survive long enough for fertilization to occur. What mechanism of reproductive isolation is in operation in this example? a.Temporal isolation. b.Mechanical isolation. c.Low hybrid viability. d.Gametic isolation.arrow_forward1. What is speciation? 2. What is a “hybrid zone”? 3. What postzygotic barriers are often found in hybrid zones that result in a lack of species fusion? 4. What are the differences among the three possible outcomes for hybrids over time: reinforcement, fusion, and stability?arrow_forward5. How might climate change affect the creation of new hybrid zones? 6. What is the difference between a punctuated pattern of speciation and a gradual pattern of speciation? 7. What is a possible genetic mechanism for gradualism? 8. What is a possible genetic mechanism for punctuated equilibrium?arrow_forward
- 1. Are there any advantages in breeding organisms from closely related species? Explain.arrow_forward1. Aside from the provided species concepts, if you are to MAKE YOUR OWN SPECIES CONCEPT, how would you define it? Discuss it and note that it should be your own definition for species concept, not others.arrow_forward1. List down at least 3 different traits that can be introduced to organisms to change their properties and give examples of modified traits using cloned genes and their and their applications. 2. What are the various types of reproductive isolating mechanisms that can lead to speciation? -What are the different modes of speciation? -Explain how evolution produce the tremendous amount of diversity among organisms.arrow_forward
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