In the absence of geographic barriers,________ speciation may occur when reproductive isolating mechanisms develop between two populations.

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Sympatric speciation occurs within the same geographical area, typically through the development of reproductive isolating mechanisms such as polyploidy, habitat differentiation, or sexual selection. In contrast, allopatric speciation occurs when populations become geographically isolated from each other, typically through a physical barrier, and genetic divergence occurs over time. Ecological and extrinsic factors may play a role in both sympatric and allopatric speciation, but are not the defining factor in determining the type of speciation that occurs.

In the Absence of Geographic Barriers,________ Speciation May Occur When