Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Textbook Question
Chapter 22, Problem 5TYU
Which of the following factors would not contribute to allopatric
- A. A population becomes geographically isolated from the parent population.
- B. The separated population is small, and genetic drift occurs.
- C. The isolated population is exposed to different selection pressures than the ancestral population.
- D. Gene flow between the two populations is extensive.
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Which of the following is not an event that can contribute to allopatric speciation?
a.
A mountain range forms and splits two populations into populations that begin to turn into new species.
b.
A subset of individuals disperse to a far away island and begin to turn into a new species.
c.
Two populations breed in the same location but at different times, and therefore begin to turn into two new species.
d.
A river splits a population into two populations and the two populations begin to diverge on either side of the river.
e.
All of these are potential contributors to allopatric speciation.
A defining characteristic of sympatric speciation is
a.The appearance of new species in the midst of old ones
b.Asexually reproducing populations
c.Geographic isolation.
d.Large populations
Indicate whether each of the following conditions would tend to cause speciation to occur faster (F),
or if it would tend to slow down or prevent speciation (S). Put either an F or an S in each box.
A. a small sub-group of a population becomes geographically isolated from the main population and
experiences new environmental conditions
B. a large population of herbivores lives in an environmental where the conditions have remained
stable over a long period of time
C. a colony of monkeys clinging to floating debris is washed out to sea by a storm and lands on an
island with diverse habitats, abundant food, but without any other primates
D. a large population of a migratory species splits up every year and takes different routes to their
common mating territory
Chapter 22 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd 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 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 22 - SCIENCE, TECHNOLOGY, AND SOCIETY In the United...Ch. 22 - FOCUS ON EVOLUTION Explain the biological basis...Ch. 22 - FOCUS ON INFORMATION In sexually reproducing...Ch. 22 - Prob. 11TYU
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- Which of the following statement about the outcome of the evolution of a new species through hybridization is false? a.The new species may have traits that allow it to inhibit environments different from both parental species. b.The new species is always an intermediate of the two parental species c.The new species may have greater genetic diversity and greater trait diversity than the parental species. d.None of the above What are the two ways of looking into evolution in detail? a.Micro frequency change and ascent with modification b.Genotypic and phenotypic modification c.DNA frequency change and inheritance modification d.Allele frequency change and descent with modification Natural selection increases the frequencies of advantageous alleles and decreases deleterious alleles' frequencies. What are the three categories of natural selection depending on the favored traits? a.Directive, selective and native b.Indicative, normative and fixative c.Directional, stabilizing and…arrow_forwardWhich of the following is NOT true for the speciation of finches in the Galapagos islands? A. Natural selection acted on beak shape, and resulted in different beak morphologies for different food sources. B. Assortative mating reinforced existing divergence between birds. C. Speciation of finches started by birds starting to specialize on different food sources. D. Speciation of finches on the same island is due to allopatric speciation.arrow_forwardClimate change and glacial advances during the Pleistocene ice age (2.6 million to 11,700 years ago) split the ranges of several North American bird species into western and eastern populations. The western and eastern populations eventually diverged into two species. What is this an example of? A. Allopatric speciation following dispersal B. Allopatric speciation via vicariance C. Sympatric speciation due to balancing selection D. Sympatric speciation via autopolyploidy E. Sympatric speciation via allopolyploidyarrow_forward
- Which of the following may be true of two species that are a result of allopatric speciation? Select all that apply. a They will be genotypically similar. b They will be phenotypically similar. c They can produce viable offspring. d They will be geographically isolated.arrow_forwardA population of lizards colonizes a region and feeds on small arthropod species. Over time, a small group within the population starts eating different types of worms. Over time, this group develops inherited traits that help them catch, eat, and digest the worms. The two lizard groups share the same habitat but no longer recognize each other’s mating calls. What does this scenario best describe? A. speciation without geographic isolation B. natural selection without speciation C. increased genetic variation without speciation D. decreased genetic variation with geographic isolationarrow_forwardWhich of the following could result in allopatric speciation? A. Two populations of a species are separated by a river that they are unable to cross. B. Two populations of a species are separated by a field that is too dry during the summertime. C. One group within a population mates during the evenings and another during the mornings. D. One group within a population develops a new mating ritual that is not recognized by the other.arrow_forward
- Which of the following is a good description of Sympatric speciation? A. Speciation without geographic isolation B. Changes in sequence of DNA of an organism C. Speciation due to geographical isolation D. The change in the genetic characteristics of a population of organisms over timearrow_forwardHybridization between incompletely isolated populations a. always leads to reinforcement due to the inferiority of hybrids. b. can serve as a mechanism for preserving gene flow between populations, thus preventing speciation. c. only occurs in plants. d. never affects rates of speciation.arrow_forwardWhich of the following statements is false? a. Gradual speciation is most likely to occur in a large population that lives in a stable climate. b. Punctuated equilibrium is unlikely to occur in a large population that lives in a stable climate. c. Gradual speciation and punctuated equilibrium both result in the divergence of species. d. Gradual speciation is most likely to occur in a small population that experiences a rapid change in its environment.arrow_forward
- Which of the following is an example of sympatric speciation? Group of answer choices a. birds moving to the far side of a mountain range b. squirrel populations on opposite sides of the Grand Canyon c. insects moving to new host plant species d. fish in two different lakesarrow_forwardA sudden increase in gene flow between two somewhat isolated populations would most likely Group of answer choices a. have no effect on the chance of speciation b. decrease the genetic similarity between the two populations c. increase the chance of speciation d. increase the genetic divergence between the two populations e. decrease the chance of speciationarrow_forwardIf gene flow between two populations stops, which of the following could occur given enough time? a. speciation b. the population each gain unique alleles c. the timing of reproduction changes ending their ability to interbreed d. frequencies of alleles shift in different ways e. these are all things that could occur if gene flow between two populations of one species ended, given enough timearrow_forward
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