2 SEM ACC W/RAVEN CARDED
12th Edition
ISBN: 9781264439218
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 55, Problem 4S
Refer to figure 56.7. Examine the pattern of beak size distributions of two species of finches on the Galápagos Islands. One hypothesis that can be drawn from this pattern is that character displacement has taken place. Are there other hypotheses? If so, how would you test them?
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One of Darwin’s finches, the medium ground finch (Geospiza fortis), is found on the small island of Daphne Major. These finches are seedeating birds. A major drought occurred on the island in 1977. Following the drought, the average beak size of medium ground finches had increased about 3%–4%. Why might a drought lead to an evolutionary change in beak size? Propose a hypothesis and explain how you could go about testing it.
This data table shows the average beak length for ground finches from
the Galapagos islands over four generations. How can you explain this
data using your knowledge of natural selection?
Generation 1
Generation 2
Generation 3
Generation 4
3.5 сm
3.5 cm
5.5 cm
7.5 сm
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Discuss the role of these mechanisms in driving speciation and shaping the evolutionary relationships among humans, chimps, and gorillas, based on genetic evidence such as comparative genomics and molecular phylogenetics.
Chapter 55 Solutions
2 SEM ACC W/RAVEN CARDED
Ch. 55.1 - Prob. 1LOCh. 55.1 - Prob. 2LOCh. 55.2 - Prob. 1LOCh. 55.2 - Prob. 2LOCh. 55.2 - Explain how the presence of other species can...Ch. 55.3 - Prob. 1LOCh. 55.3 - Prob. 2LOCh. 55.4 - Explain the different forms of symbiosis.Ch. 55.4 - Prob. 2LOCh. 55.4 - Explain how the occurrence of one ecological...
Ch. 55.5 - Prob. 1LOCh. 55.5 - Describe how early colonizers may affect...Ch. 55.5 - Prob. 3LOCh. 55 - Prob. 1DACh. 55 - Prob. 2DACh. 55 - Prob. 1IQCh. 55 - Prob. 2IQCh. 55 - Prob. 3IQCh. 55 - Prob. 4IQCh. 55 - Prob. 5IQCh. 55 - Prob. 6IQCh. 55 - Prob. 7IQCh. 55 - Studies that demonstrate that species living in an...Ch. 55 - Prob. 2UCh. 55 - According to the idea of coevolution between...Ch. 55 - In order for mimicry to be effective in protecting...Ch. 55 - Which of the following is an example of...Ch. 55 - A species whose effect on the composition of a...Ch. 55 - When a predator preferentially eats the superior...Ch. 55 - Prob. 8UCh. 55 - Prob. 1ACh. 55 - The presence of a predatory species a. always...Ch. 55 - Resource partitioning by sympatric species a....Ch. 55 - Parasitism differs from predation because a. the...Ch. 55 - The presence of one species (A) in a community may...Ch. 55 - Competition is traditionally indicated by...Ch. 55 - Refer to figure 56.9. If the single prey species...Ch. 55 - Prob. 3SCh. 55 - Refer to figure 56.7. Examine the pattern of beak...Ch. 55 - Is it possible that some species function together...
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- If you had measured a set of morphological traits (beak depth, wing length, leg length, tail length, body size) in both the parent and offspring generations, would it be useful to measure any changes in these traits in the parent generation after the drought killed the birds with shallower beaks? Could any such changes measure a correlated response to natural selection on beak depth? Why or why not?arrow_forward(b) There is a positive correlation between branch width of trees and hind limb length of the brown anole lizard: Wide branch diameter = long hind limbs Narrow branch diameter= short hind limbs A group of lizards becomes separated from the main group on Island A due to a catastrophic hurricane that carries this small group out to sea. A few lizards are able to make it to uninhabited, dry land (Island B) and breed over several generations separated from the lizards on Island A. Scientists, monitoring the lizard populations, record the change in hind limb length of these two new populations over time. The results are shown below: Island A Island B Linear (Island A) Linear (Island B) 1975 1980 1985 1990 1995 2000 2005 2010 2015 Figure 1: Change in hind limb length of brown anole lizards Page 2 CONT'D from Page 1 i. State the type of speciation event that has occurred and fully explain how this event could possibly give rise to a new species of anole lizard on Island B. ii. Based on the…arrow_forwardSuppose you have four species of lizard and you are interested in how leg length will change in a single generation of evolution under directional selection. Given the following parameters, which lizard do you predict will change the most in one generation? Species A: Heritability: 0.5, selection differential: 1.2 Species B: Heritability: 0.4, selection differential: -1.9 Species C: Heritability: 0.9, selection differential: -0.67 Species D: Heritability: 0.1, selection differential 3.2 Species A Species B Species C Species Darrow_forward
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