Which is a key distinction between allopatric and non-polyploid sympatric speciation?
A) Differences in selective pressures usually precede geographic barriers in allopatric, but not sympatric, speciation.
B) Differences in selective pressures usually precede geographic barriers in sympatric, but not allopatric, speciation.
C) Allopatric, but not sympatric, speciation involves genetic changes.
D) Sympatric, but not allopatric, speciation involves genetic change.
E) Sympatric speciation is usually a much longer process than allopatric speciation.

Question

Quizplus · Accepted Answer

In allopatric speciation, the separation of populations by a geographic barrier precedes any differences in selective pressures between the populations. In sympatric speciation, however, differences in selective pressures within a single geographic area can lead to the evolution of separate species. Additionally, both allopatric and sympatric speciation involve genetic changes, but polyploid sympatric speciation involves genome duplication. The length of the speciation process can vary depending on the specific circumstances in each case, so option E is not a key distinction between the two types of speciation.

Which Is a Key Distinction Between Allopatric and Non-Polyploid Sympatric