Concept explainers
To determine: Theeffect of sympatric and allopatric
Introduction: Evolution is the change in the
Explanation of Solution
Adaptive radiation is an important concept in evolutionary biology. The adaptive radiation is one of the few processes that allow the divergence or convergence of two or more species. Adaptive radiation requires both allopatric and sympatric speciation along with adaptation to different habitats. Speciation mainly occurs allopatrically and leads to rising of species that colonize other islands producing multiple species per island.
To determine: The relationship between the sympatric speciation and character displacement.
Introduction: Evolution of organism results into various types of accumulations in the genes of an organism that enable an individual to adapt in the changing environment.
Explanation of Solution
Sympatric speciation also occurs during the course of multiple generation because of disruptive selection and can result in the population to contain individuals exhibiting two different phenotypes. The instantaneous sympatric speciation occurs when an individual born is reproductively isolated from all other members of its species. A mutation that would cause an individual to be different from other members of species result in pleiotropic effects and subsequently end in adaptive radiation.
Want to see more full solutions like this?
Chapter 22 Solutions
Biology
- What are the most common mechanisms of sympatric speciation and in which major group of organisms does this happen often? Distinguish between sympatric, allopatric and parapatric speciatio. Which is considered the (far) more common mechanism of species formation? What does "gene flow" between populations do?arrow_forwardOver time, enough genetic variations can develop within a population to cause it to undergo speciation. Identify the various mechanisms that will prevent different species from being able to reproduce successfully. Which of these mechanisms is the most influential in keeping species sperate?arrow_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_forward
- a) How many of the gene trees do you expect to look like the species tree? b) You observe three gene trees in which species X and Z are the closest relatives and seven gene trees where X and Y are the closest relatives. What can you conclude from these data? Group of answer choices Historical hybridization between species W and X Historical hybridization between species X and Y Historical hybridization between species X and Z Historical hybridization between species Y and Zarrow_forwardWhat are the most common mechanism of sympathric speciation and in which major group of organisms does this happen most often? Distinguish between sympathric and allopathric and parapathric speciation. Which is considered the (far) more common mechanism of species formation? What does "gene flow"between populations do?arrow_forwardWhat are the most common mechanisms of symptoms speciation and in which major ground of organisms does this happen most often? Distinguish between sympatric and allopatric and parapatric speciation. What is considered the (far) more common mechanism of species formation? What does "gene flow " between populations do?arrow_forward
- 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.arrow_forwardWhat is speciation? List any two events that lead to speciation?arrow_forwardWhat are the most common mechanisms of sympatric speciation and in which major group of organism does this happen most often?distinguish between sympatric and allopatric and parapatric speciation what is considered the(far)more common mechanism of species formation?what does gene flow between population does?arrow_forward
- Two hundred years ago, the fly species Rhagoletis pomonella only laid its eggs on fruit of the hawthorn tree. Today, different "host races" of R. pomonella lay their eggs on hawthorns OR apples. Apples occur within the range of hawthorns, so divergence between apple flies and hawthorn flies could be the first step in sympatric speciation. Choose the evidence that would suggest that R. pomonella is currently undergoing sympatric speciation. Check ALL answers that apply. A. Apple flies and hawthorn flies are able to form fertile hybrids. B. Apple flies and hawthorn flies are physically indistinguishable from each other. C. Apple flies typically mate with apple flies, and hawthorn flies typically mate with hawthorn flies. D. Apple flies and hawthorn flies emerge from their hosts at different times of the year.arrow_forwardIndicate the order in which the following steps would take place to result in Sympatric Speciation [enter 1 for the first step, 2 for the second, etc; write only the number -- no words, no spaces] As they adapt to their specific environments, the fitness of any hybrid formed is reduced. Reproductive isolating mechanisms are selected for so that less fit hybrids are not formed. Two species now exist. Interbreeding populations connected via gene flow occur across a range. The populations in the new environment adapt to their particular circumstances while the remainder stay as they were. Something happens so that some members of the populations/species change their environment (shift hosts; have a genetic change like polyploidy or inversions), so that they are separated from the others even thought hey are living in the same area.arrow_forwardTwo morphological variants in a population of medium ground finch on the Galapagos Islands have been found to exist. Individuals of each variant respond more strongly to songs produced by the same variant, and prefer to mate with individuals of their own morphological variant. What type of speciation could be in progress, and what measurements could inform the extent of prezygotic reproductive barriers that have developed? A. Sympatric speciation by sexual selection; survival and reproductive success of hybrids of the two morphological variants. B. Allopatric speciation by habitat differentiation; survival and reproductive success of hybrids of the two morphological variants. C. Sympatric speciation by sexual selection; frequencies of mating and numbers of viable offspring of the two morphological variants. D. Allopatric speciation by habitat differentiation; frequencies of mating and numbers of viable offspring of the two morphological variants.arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education