Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 17, Problem 10SQ
The difference between sympatric and parapatric
- a. parapatric speciation occurs only in worms
- b. sympatric speciation requires a barrier to gene flow
- c. the extent of overlap in range
- d. reproductive isolation does not occur
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The difference between sympatric and parapatric speciation is_______ . a. parapatric speciation occurs only in velvet walking worms b. sympatric speciation requires a barrier to gene flow c. the extent of overlap in range d.reproductive isolation does not occur
Speciation:
A.
is a process by which populations of one species diverge genetically and which produces one or more new species
B.
is the result of minor extinction events
C.
only results from interspecific hybridization
D.
is completed when two different species are able to interbreed
E.
always takes millions of years
Hybridization 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.
Chapter 17 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 17 - ___ is the original source of new alleles. a....Ch. 17 - Which is required for evolution to occur in a...Ch. 17 - Prob. 3SQCh. 17 - Prob. 4SQCh. 17 - The persistence of sickle-cell anemia in a...Ch. 17 - ___ tends to keep populations of a species similar...Ch. 17 - The theory of natural selection does not explain...Ch. 17 - Prob. 1DAACh. 17 - Prob. 2DAACh. 17 - Prob. 3DAA
Ch. 17 - Prob. 4DAACh. 17 - Which of the following is not part of how we...Ch. 17 - Sex in many birds is typically preceded by an...Ch. 17 - The difference between sympatric and parapatric...Ch. 17 - A fire devastates all trees in a wide swath of...Ch. 17 - Match the evolution concepts. ____ gene flow a....Ch. 17 - Change in allele frequency of a population is...Ch. 17 - Species have traditionally been characterized as...Ch. 17 - Rama the cama, a llama-camel hybrid, was born in...Ch. 17 - Two species or antelope, one from Africa, the...Ch. 17 - Prob. 4CT
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- If reinforcement is weak and hybrids are not completely infertile, a. genetic divergence between populations may be overcome by gene flow. b. speciation will occur 100% of the time. c. gene flow between populations will be impossible. d. the speciation will be more likely than if hybrids were completely infertile.arrow_forwardALLOPATRIC SPECIATION a. Does food affect the mating preferences of the fruitflies? b. What would the results be in each generation if a few fruit flies from thesweet potato/pineapplefruit population had been placed in the bananapopulation or vice versa. Explain your prediction.arrow_forwardWhich variable increases the likelihood of allopatric speciation taking place more quickly? a. lower rate of mutation b. longer distance between divided groups c. increased instances of hybrid formation d. equivalent numbers of individuals in each populationarrow_forward
- Secondary contact after divergence rarely results in? A. creation of a hybrid zone B. formation of a new species C. the rapid decline of both populations D. extinction of one populationarrow_forwardmountain range separates a population of gorillas. After many generations, the gorillas on different sides of the mountain range cannot produce viable, fertile offspring. What has happened? a. Sympatric speciation c. Parapatric speciation b. Allopatric speciation d. Adaptive radiationarrow_forwardThe three beetle species live in the same ecosystem, and they likely evolved from the ancestral species that colonized the region. Which statement best explains how descent with modification influenced speciation in these beetles? A. The ancestral species carried neutral gene mutations that spontaneously caused speciation when they colonized the region. B. The ancestral species randomly diverged into three species before colonization and then colonized the regions that best suited their new adaptations. C. After colonization, small groups separated from the rest of the ancestral species and developed different adaptations that helped them survive and reproduce. D. After colonization, the large group interbred until they developed enough neutral genetic mutations for speciation to occur.arrow_forward
- Which is a criticism of sympatric speciation? A.) many cases of sympatric speciation are actually microallopatry B.) allopatric speciation is less common and scientists should focus more attention on locating additional examples C.) sympatric speciation is only associated with changes in ploidy, a process so rare that it's relatively unimportant D.) since most examples of sympatric speciation involve post zygotic isolation, hybridization nearly always results in their reversalarrow_forwardThese two meadowlarks are two separate species, the eastern meadowlark (Sturnella magna) and the western meadowlark (Sturnella neglecta). Although they look very similar and have similar habitats, they are considered different species because Group of answer choices A. the two do not normally interbreed. B. they have different songs. C. they do not share the same habitat. D. their ranges do not overlap.arrow_forwardWhat is required for sympatric speciation to occur? A. Continuous gene flow between different populations B. Geographic separation of populations C. Two populations that are different begin to reproduce and create hybrids D. Emergence of a reproductive barrierarrow_forward
- Two very similar cricket species in the Amazon basin occur on opposite sides of the Amazon river (crickets can’t swim). What type of speciation process probably caused them to split into two forms? Group of answer choices a. sympatric b. allopatric c. reinforcement d. fusion e. stable hybrid zonearrow_forwardWhen the isthmus of Panama (land bridge that connects north and south America) arose about 3 million years ago, it caused species of fish to diverge into sister species located in either the caribean or pacific ocean. Why did they form separate species? A) Because this is an example of sympatric speciation B) Because the tides are different on each side of the land bridge C) Because different predators in each ocean caused the populations to diverge D) Because the populations were reproductively isolatedarrow_forwardAnalysis of Rhagoletis fly populations in North Americaprovides evidence that if some members of an insectpopulation shift to a new host species,a. sympatric speciation may eventually result.b. adaptive radiation is likely.c. little or no subsequent genetic divergence is likely.d. sympatric speciation is probably impossible in insects.arrow_forward
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