Question

The museum displays explain that geographic isolation often leads to speciation, where one population becomes two distinct species. What process occurs during geographic isolation that eventually prevents interbreeding?
Question 8 options:

Geographic isolation immediately creates new species without any genetic changes

Isolated populations automatically develop the desire to avoid mating with the original population

Separated populations accumulate genetic differences that eventually create reproductive barriers

Isolated populations always become identical to their original population over time

Answer 1

Correct answer: Separated populations accumulate genetic differences that eventually create reproductive barriers.

Explanation: When populations are geographically isolated they experience independent mutations, genetic drift, and different selection pressures. Over time these genetic changes can lead to reproductive barriers (prezygotic or postzygotic), preventing interbreeding and resulting in speciation.