Speciation requires different selective pressures to be applied to groups. True False Allopatric speciation is due to the formation of a prezygotic barrier. True False Allopatric speciation through founder events is related to what mechanism of evolution, besides natural selection? Mutation Non-random mating Migration Genetic drift Sympatric speciation usually results due to the separation of populations ecology environments land masses
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Step 1: Speciation requires different selective pressures to be applied to groups in order to drive reproductive isolation. Show more…
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Which of the following is false regarding speciation? A. Speciation usually occurs over many generations, with populations gradually diverging due to drift and/or selection until the are fully separate lineages B. Speciation (defined as reproductive isolation) can occur almost instantly – due to changes in chromosome #, for example C. If two recently diverged species come back into contact and hybrid offspring are inviable, there will be selection for differentiation in breeding signals D. If two groups are “good” species according to the biological species concept, they will also exhibit fairly clear differences in appearance or ecology
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The classic model of speciation involves an extrinsic (externally-imposed) barrier that divides a population and allows the two sub-populations to evolve independently until they become incompatible with each other. True False
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