Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 18, Problem 9RQ
What is the main difference between dispersal and vicariance?
- One leads to allopatric
speciation , whereas the other leads to sympatric speciation - One involves the movement of the organism, and the other involves a change in the environment
- One depends on a genetic mutation occurring, and the other does not
- One involves closely related organisms, and the other involves only individuals of the same species.
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Students have asked these similar questions
Which 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 above
Which of the following models, that attempt to explain human origins and dispersal, no longer is supported due to current information supplied by genetic evidence? In other words, which model has been thrown out while the other two are still being debated?
Group of answer choices
multiregional model
partial replacement model
complete replacement model
One example of coevolution is when speciation within one group of organisms drives speciation within another group of organisms with which it interacts. The term for this type of coevolution is which of the following?
Mutualism
Antagonism
Cospeciation
Cooperation
Conflict
Chapter 18 Solutions
Biology 2e
Ch. 18 - Figure 18.14 Which is most likely to survive,...Ch. 18 - Figure 18.22 If two species eat a different diet...Ch. 18 - Figure 18.23 Which of the following statements is...Ch. 18 - Which scientific concept did Charles Darwin and...Ch. 18 - Which of the following situations will lead to...Ch. 18 - Which description is an example of a phenotype? A...Ch. 18 - Which situation is most likely an example of...Ch. 18 - Which situation would most likely lead to...Ch. 18 - What is the main difference between dispersal and...Ch. 18 - Which variable increases the likelihood of...
Ch. 18 - What is the main difference between autopolyploid...Ch. 18 - Which reproductive combination produces hybrids?...Ch. 18 - Which condition is the basis for a species to be...Ch. 18 - Which situation is not an example of a prezygotic...Ch. 18 - Which term is used to describe the continued...Ch. 18 - Which components of speciation would be least...Ch. 18 - If a person scatters a handful of garden pea plant...Ch. 18 - Why do scientists consider vestigial structures...Ch. 18 - How does the scientific meaning of “theory” differ...Ch. 18 - Explain why the statement that a monkey is more...Ch. 18 - Why do island chains provide ideal conditions for...Ch. 18 - Two species of fish had recently undergone...Ch. 18 - Why can polyploidy individuals lead to speciation...Ch. 18 - What do both rate of speciation models have in...Ch. 18 - Describe a situation where hybrid reproduction...
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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
- How is sympatric speciation different from allopatric speciation? Group of answer choices Allopatric speciation requires a geographic barrier, while sympatric speciation occurs in one place Allopatric speciation results in hybrids, while sympatric speciation does not Allopatric speciation is a result of behavioral isolation, while sympatric speciation is a result of habitat isolation Allopatric speciation occurs in one place, while sympatric speciation requires a geographic barrierarrow_forwardHow come dispersal is still allopatric speciation? I was under the impression that a new geographical barrier would have to develop and separate a once-uniform species. Also, what's the difference between vicariance and allopatric speciation?arrow_forwardWhat is Allopatric speciation? A) When a population is separated from the main group by a barrier and becomes a new species B) When a population mutates into a new species C) When a population develops into a new species without any physical barriers to isolate themarrow_forward
- What are characteristics of sympatric speciation? Select all that apply. Reproductive isolation necessary to end gene flow Divergence within a population leads to speciation Absence of a physical barrier Presence of a physical barrier Reproductive isolation unnecessary to end gene flowarrow_forwardA species that has a high rate of long-distance dispersal is more likely to colonize new habitat. But that species may also be less likely to adapt to local conditions, because migration will be stronger than local selection pressures for many loci. In light of those considerations, when do you expect that increasing dispersal might result in the evolution of a larger geographic range, and when might it not?arrow_forwardAerobic organisms are dependent on autotrophs. One reason for this dependency is that most autotrophs provide the aerobic organisms with oxygen. nitrogen gas. carbon dioxide. hydrogen. Two different species in a particular ecosystem share the same niche. What is most likely true about these two species? They are the result of an allopatric speciation event They compete intensely One is a predator, the other its prey They are the result of a sympatric speciation eventarrow_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_forwardThe primary mechanism of sympatric speciation is a)dispersal and colonization of new environments b)arrow_forwardWhat is Sympatric speciation? A) When a population is separated from the main group by a barrier and becomes a new species B) When a population mutates into a new species C) When a population develops into a new species without any physical barriers to isolate themarrow_forward
- A small group of individuals from a bird species is carried by strong winds to a distant island, where they establish a new population that eventually diverges into a separate species. This is an example of: Parapatric speciation Allopatric speciation (vicariance) Allopatric speciation (dispersal) Sympatric speciationarrow_forwardA species that has a high rate of long-distance dispersal is more likely to colonize new habitat. But that species may also be less likely to adapt to local conditions, because migration will be stronger than local selection pressures for many loci. in light of those considerations, when do you expect that increasing dispersal might result in the evolution of a larger geographic range, and when might it not? Your answerarrow_forwardHow does one species diverge from another? (When do we call a group a new species—and how does that process happen?) Using anole lizards or another very specific example(s), compare and contrast microevolutionary processes with speciation. As you discuss speciation, be sure to compare and contrast sympatric speciation with allopatric speciation and say whether the example you’ve chosen is allopatric or sympatric.arrow_forward
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