2 SEM ACC W/RAVEN CARDED
12th Edition
ISBN: 9781264439218
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 22, Problem 4S
Refer to figure 22.16. Geospiza fuliginosa and Geospiza fortis are found in sympatry on at least one island in the Galápagos and in allopatry on several islands in the same archipelago. Compare your expectations about degree of morphological similarity of the two species in these two contexts, given the hypothesis that competition for food played a large role in the adaptive radiation of this group. Would your expectations be the same for a pair of finch species that are not as closely related? Explain.
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Chapter 22 Solutions
2 SEM ACC W/RAVEN CARDED
Ch. 22.1 - Understand the biological species concept and why...Ch. 22.1 - Define the two kinds of reproductive isolating...Ch. 22.1 - Describe the relationship of reproductive...Ch. 22.2 - Prob. 1LOCh. 22.2 - Prob. 2LOCh. 22.3 - Prob. 1LOCh. 22.3 - Prob. 2LOCh. 22.4 - Compare and contrast sympatric and allopatric...Ch. 22.4 - Prob. 2LOCh. 22.5 - Prob. 1LO
Ch. 22.5 - Prob. 2LOCh. 22.6 - Prob. 1LOCh. 22.6 - Prob. 2LOCh. 22.7 - Prob. 1LOCh. 22.7 - Prob. 2LOCh. 22 - Prob. 1IQCh. 22 - Prob. 2IQCh. 22 - Prezygotic isolating mechanisms include all of the...Ch. 22 - Reproductive isolation is a. a result of...Ch. 22 - Problems with the biological species concept...Ch. 22 - Prob. 4UCh. 22 - Prob. 5UCh. 22 - Prezygotic isolation a. always involves mechanisms...Ch. 22 - Speciation by allopolyploidy a. takes a long time....Ch. 22 - Adaptive radiation a. is the result of enriched...Ch. 22 - Prob. 9UCh. 22 - Character displacement a. arises through...Ch. 22 - Prob. 11UCh. 22 - If reinforcement is weak and hybrids are not...Ch. 22 - Natural selection can a. enhance the probability...Ch. 22 - Hybridization between incompletely isolated...Ch. 22 - Natural selection can lead to speciation a. by...Ch. 22 - Natural selection can lead to the evolution of...Ch. 22 - Prob. 2SCh. 22 - Refer to figure 22 6 In Texas. Drummond s phlox is...Ch. 22 - Refer to figure 22.16. Geospiza fuliginosa and...
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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
- Explain the difference in behaviors of temporally isolated species when it comes to Allopatric vs Sympatric speciation.arrow_forwardPeter and Rosemary Grant of Princeton University have studied the ecology and evolution of finches on the Galapagos Islands since the early 1970s. They have shown that finches with large bills (as measured by bill depth; see Figure) can eat both small seeds and large seeds, but finches with small bills can only eat small seeds. In 1977, a severe drought on the island of Daphne Major reduced seed production by plants. After the birds consumed whatever small seeds they found, only large seeds were still available. The resulting food shortage killed a majority of the medium ground finches (Geospizafortis) on Daphne Major; their population plummeted from 751 in 1976 to just 90 in 1978. The Grants research also documented a change in the distributions of bill depths in the birds from 1976 to 1978, as illustrated in the graphs to the right. In light of what you now know about the relationship between bill size and food size for these birds, interpret the change illustrated in the graph. What type of natural selection does this example illustrate? Source: P. R. Grant. 1986. Ecology and Evolution of Darwins Finches. Princeton University Press.arrow_forwardWhich of the following statements about sympatric speciation is correct? It is a process through which two populations can diverge and develop reproductive isolation while in two different geographic area. It is the most common mechanism for populations to form independent species. Postzygotic isolation is the main form of reproductive isolation for the sympatric speciation process. Genetic isolation through large scale chromosomal mutations, such as chromosome inversion or polyploidy, are more likely contributing to sympatric speciation. None of the abovearrow_forward
- Please answer asap and in short and content should not be palgarised pleasearrow_forwardThe heritability of an animal’s preference for different habitats or host plants might be high or low. How might heritability affect the likelihood of sympatric speciation by divergence in habitat or host preference?arrow_forwardConsider this example. Shorebirds on the Eastern coast of North America feed on the mollusks and tiny crabs along the shore. Birds with tougher beaks are better adapted to crack open the shells of the mollusks, and birds with sharper beaks are better adapted to pierce the shells of crabs. Over time, the shorebirds become two separate species that no longer breed with one another. What type of speciation has occurred? A. Sympatric speciation B. Adaptive speciation C. Microevolution speciation D. Allopatric speciationarrow_forward
- Which of these options is NOT an example of a hypothesis that supports the occurrence of ecological speciation: ecologically divergent pairs of populations should be more reproductively isolated from one another than more ecologically similar pairs of populations traits that lead to divergent adaptations between populations should lead to reproductive isolation between those populations as well levels of gene flow between ecologically divergent populations should decrease as populations become more ecologically divergent ecologically divergent populations should differ in use of signals that relate to mate selectionarrow_forwardThree-spined sticklebacks that have colonized freshwater streams and lakes have repeatedly evolved into similar forms. The pattern can be seen in hundreds of freshwater bodies around the world. Can a single biological species arise more than once (i.e., polyphyletically)? How might this possibility depend on the nature of the reproductive barrier between such a species and its closest relative?arrow_forwardCompare the roles of reproduction isolation, geographic isolation, and competition in the speciation of Darwin's finches on the Galapagos Islandsarrow_forward
- The Bateson-Dobzhansky-Muller model: Shows how chromosomal changes can lead to sympatric speciation Shows how epistasis can lead to sympatric speciation Shows how drift, with no selection, can lead to allopatric speciation Shows how selection, with no drift, can lead to allopatric speciation Predicts that reproductive isolation will build up quickly in sympatryarrow_forwardSome females seem to prefer the blue color and some females seem to prefer yellow color. If this a diversifying/ disruptive selection, how could diversifying/disruptive selection result in sympatric speciation in this example?arrow_forwardExplain why parapatric speciation is more likely to occur in sedentary organismsarrow_forward
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