Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Publisher: PEARSON
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Chapter 22.3, Problem 2CC
WHAT IF? Consider two species that diverged while geographically separated but resumed contact before reproductive isolation was complete. Predict what would happen over time if the two species mated indiscriminately and (a) hybrid offspring survived and reproduced more poorly than offspring from intraspecific matings or (b) hybrid offspring survived and reproduced as well as offspring from intraspecific matings.
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Question: Summarize how new species can arise by explaining the differences between allopatric and sympatric isolation. Give a real example of when allopatric speciation has been observed and when sympatric speciation has been observed.
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Chapter 22 Solutions
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
Ch. 22.1 - Prob. 1CCCh. 22.1 - WHAT IF? Suppose you are studying two bird species...Ch. 22.2 - Contrast allopatric and sympatric speciation....Ch. 22.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 22.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 22.3 - What are hybrid zones, and why can they be viewed...Ch. 22.3 - WHAT IF? Consider two species that diverged while...Ch. 22.4 - Speciation can occur rapidly between diverging...Ch. 22.4 - Summarize evidence that the yup flower-color locus...Ch. 22.4 - MAKE CONNECTIONS Compare Figure 10.11 with Figure...
Ch. 22 - The largest unit within which gene flow can...Ch. 22 - Males of different species of the fruit fly...Ch. 22 - According to the punctuated equilibria model, A....Ch. 22 - Bird guides once listed the myrtle warbler and...Ch. 22 - Which of the following factors would not...Ch. 22 - Plant species A has a diploid number of 12. Plant...Ch. 22 - SCIENCE, TECHNOLOGY, AND SOCIETY In the United...Ch. 22 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 22 - FOCUS ON EVOLUTION Explain the biological basis...Ch. 22 - FOCUS ON INFORMATION In sexually reproducing...Ch. 22 - Suppose that females of one population of straw-...
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- MAKE CONNECTIONS Explain how natural selection could increase the resemblance of a harmlessspecies to a distantly related harmful species. In addition to selection, what else could account for a harmlessspecies resembling a closely related harmful species? (See Concept 22.2.)arrow_forwardThe reproductive isolating mechanism in which two closely related species live in the same geographic area but reproduce at different times is (a) temporal isolation (b) behavioral isolation (c) mechanical isolation (d) gametic isolation (e) hybrid inviabilityarrow_forwardSelect all that apply. Beetles from two geographically isolated populations are captured and brought to the lab. When an adult male from one population and an adult female from the other population are placed together, they mate, and the female lay eggs a couple of days later. The eggs hatch, the beetles develop into adults but are sterile. Which of the following are true? This is an example of post-zygotic reproductive isolation. O Sexual selection is likely responsible. O This is an example of pre-zygotic reproductive isolation. O Dobzhansky-Muller genetic incompatibility is likely responsible. Question 3 Choose all that apply. Which of the following are true of adaptive radiations? OAdaptive radiations involve relatively rapid speciation. The evolution of the Hawaiian silverswords is an example of an adaptive radiation. OAdaptive radiations can occur when an ancestral species colonizes a new arca and adapts to multiple open niches. Question 4 What are the three major steps of…arrow_forward
- Decide whether each of the following scenarios would lead to prezygotic or postzygotic reproductive isolation: a) Dragonflies from two different populations have genitals that do not match, so they can't mate successfully [Select ] b) Two different species of fish have very different courtship displays, but they can mate and produce a non-fertile offspring [Select] c) One species of plant flowers in the winter, while another flowers in early spring [ Select ] d) The gametes of two tree species can fuse, but a zygote does not form [ Select ] e) A mountain range separates two populations of snakes I Select]arrow_forwardWHAT IF? Suppose two bird species live in a forestand are not known to interbreed. One species feeds andmates in the treetops and the other on the ground. Butin captivity, the birds can interbreed and produce viable,fertile offspring. What type of reproductive barrier mostlikely keeps these species separate in nature? Explain.arrow_forwardWhat data would suggest that a species evolutionary history includes sexual selection as a mechanism that helped shape the species? If males and females are significantly different from each other (sexual dimporphism) If males and females form different social groups (i.e. herds are formed from either males or females but not both) If some males reproduce with multiple females while other males do not reproduce If males engage in "risky" behaviorarrow_forward
- Suppose the phylogenetic species concept (PSC) were preferred over other species concepts, such as the BSC. What would be the implications for (a) discourse on the evolutionary mechanisms of speciation; (b) studies of species diversity in ecological communities; (c) estimates of species diversity on a worldwide basis; and (d) conservation practices under such legal frameworks as the U.S. Endangered Species Act?arrow_forwardMatchplease: 12345 pre-zygotic: geographic isolation 12345 pre-zygotic: behaviour 12345 post-zygotic: hybrid sterility 12345 pre-zygotic: timing 12345 post-zygotic: hybrid inviability 1. A species of salamanders is separated by a new road 2. Wolves tend to eat dogs. 3. A species of trout has members who mate in either April or June 4. A mule is not fertile. 5. Goats and sheep can mate, but the offspring are still-born.arrow_forwardPlease solvearrow_forward
- Answer the following biology questions on evolutionarrow_forward• Part A When populations of closely related pied flycatchers and collared flycatchers live in different geographic areas, the males of both species look a lot alike. However, when populations of the two species share a common geographic area, there are significant differences in the appearance of the two species. What conclusions might you draw from this situation? > View Available Hint(s) This is a case where hybrid offspring of the two species are less fit than either of the parent species. In the geographic areas where the populations overlap, natural selection has reinforced color differences that serve as reproductive barriers between the two species. Hybrid offspring of the two species are more fit than either of the parent species. Eventually the two hybridizing species will fuse into one. O This is a case of random variation within the population. Even though the colors of the males of the two species are very similar in the geographically isolated populations, you would…arrow_forwardEVOLUTION CONNECTION Explain the biological basis forassigning all human populations to a single species. Can youthink of a scenario by which a second human species couldoriginate in the future?arrow_forward
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