Multiple Choice
Sometimes two phenotypically different populations interbreed to a limited extent, so that it is difficult to determine whether they are clearly separate species. This is not a concern to scientists because this __________.
23. Speciation
Introduction to Speciation
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Which of the following evolutionary mechanisms does not contribute to the process of allopatric speciation?
A
Genetic drift
B
Mutation
C
Natural selection
D
All of the listed responses are correct.
E
Gene flow
Verified step by step guidance1
Understand the concept of allopatric speciation: Allopatric speciation occurs when a population is divided by a geographical barrier, leading to the formation of new species due to genetic divergence.
Identify the role of genetic drift: In small populations, genetic drift can cause random changes in allele frequencies, contributing to genetic divergence during allopatric speciation.
Consider the impact of mutation: Mutations introduce new genetic variations, which can accumulate over time and contribute to the divergence of separated populations.
Evaluate the influence of natural selection: Natural selection can drive adaptation to different environments, leading to divergence between geographically isolated populations.
Recognize the role of gene flow: Gene flow involves the transfer of alleles between populations. In the context of allopatric speciation, gene flow is typically reduced or absent due to geographical barriers, thus it does not contribute to the process of allopatric speciation.
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