14. Suppose that members of two populations are separated by a geographic barrie

Question

14. Suppose that members of two populations are separated by a geographic barrier and begin to diverge genetically. Many generations later, when the barrier is removed, the two populations can interbreed, but the hybrid offspring do not survive and reproduce well. Consider how natural selection might lead to the evolution of more effective prezygotic barriers in these species Which of the following statements about speciation is false? A. Evolution always results in speciation B. Gene flow within a population must be interrupted for speciation to occur C. Allopatric speciation is synonymous with geographic speciation D. Founder effects are important in speciation E. Gene flow within a population may be interrupted in the absence of physical separation

Explanation / Answer

Answer: - The correct option is A. Evolution always results in speciation. This statement is false as evolution doesn't always result in speciation. Evolution is a continuous process and it always doesn't end up producing a new species, even small changes in an organism is a part of evolution. Evolution can also result in the extinction of a species. Therefore it can be said that evolution doesn't always result in speciation.

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