Agrostis tenuis grasses tolerant of zinc metals in the soil (after evolving from metal-sensitive grasses near mine soils contaminated with zinc over the past 100 years), is an example of: allopatric speciation by vicariance allopatric speciation by dispersal peripatric speciation parapatric speciation E. sympatric speciation

Agrostis tenuis grasses tolerant of zinc metals in the soil (after evolving from metal-sensitive grasses near mine soils contaminated with zinc over the past 100 years), is an example of: allopatric speciation by vicariance allopatric speciation by dispersal peripatric speciation parapatric speciation E. sympatric speciation

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter20: Speciation And Macroevolution

Section: Chapter Questions

Problem 4TYU: The first step leading to allopatric speciation is (a) hybrid inviability (b) hybrid breakdown (c)...

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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
The phyletic gradualism model of speciation asserts that; Most speciation occurs allopatrically Speciation is a slow and gradual process that occurs as species slowly become geographically separated speciation occurs in quickly and then is followed by periods with little if any change Most speciation occurs sympatrially
The first step leading to allopatric speciation is (a) hybrid inviability (b) hybrid breakdown (c) adaptive radiation (d) geographic isolation (e) paedomorphosis
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 barrier
A genome duplication event, creating a tetraploid plant from a diploid parent plant, can sometimes result in the creation of a new species. This type of speciation is called allopatric adaptive radiation sympatric gradual speciation Which of the following is an example of a postzygotic barrier? Hybrid offspring of two species of jimsonweeds always die before reproducing One plant lives on acid soil, the other on alkaline soil. Two species of leopard frogs have different mating calls Mallard and pintail ducks mate at different times of the year Pollen of one species of tobacco cannot fertilize a different species of tobacco.
Which of the following speciation mechanisms is most likely to be responsible for the divergence of a single species into two distinct species due to geographic isolation caused by a mountain range? Sympatric speciation Allopatric speciation (dispersal) Allopatric speciation (vicariance) Parapatric speciation
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 flow
true or false, Sexual selection may lead to sympatric speciation
Speciation can be initiated when grasses colonise contaminated soils at former mine sites from adjacent benign soils. What type of speciation is occuring here (allopatric, parapatric or sympatric)? explain your answer.
What is the nature of the reproductive barrier between a species that mates at dawn (sunrise) and a species that mates at dusk (sunset)? gametic temporal habitat behavioral mechanical A mountain range divides a freshwater snail species into two isolated populations. Erosion eventually lowers the range and brings the two populations together again, but when they mate, the resulting hybrids all produce sterile young. This scenario is an example of allopatric speciation gradualism punctuated equilibrium extinction sympatric speciation
Indicate the order in which the following steps would take place to result in Allopatric Speciation [enter 1 for the first step, 2 for the second, etc; write only the number -- no words, no spaces] The two groups develop reproductive isolating mechanisms so that they no longer interbreed. Interbreeding populations connected via gene flow occur across a range. The two separate groups adapt to their new environments. Some sort of physical barrier develops to split the once contiguous population(s) into two separate groups If they come back together, any hybrids formed are less fit.
two populations of a single species become geographically separated, over time they may diverge into sep © Allopatric Sympatric Physiological © All of the above