Question

so geographic divides, such as mountain ranges, rivers, or man - made barriers, can separate two populations of a single species such that they develop different traits (to adapt to their new, segmented environments). over time, these differences can prevent the two populations from interbreeding. over the course of dozens of generations, this once - single species can become two different species. this type of speciation is called allopatric speciation (allo=separate patric=homeland) because of the new homelands the two species occupy. based on what youve learned about allopatric speciation, what has to happen before allopatric speciation can take place? sort from top to bottom. the start of speciation should be at the top and the bottom should be where allopatric speciation has occured. members of each population are no longer able to reproduce fertile offspring. the traits in each population changes. one population of organisms exist. original population is split. a geographic barrier emerges. selection factors cause both populations to adapt to their new environments. allopatric speciation

Explanation:

Allopatric speciation starts with one population. A geographic barrier emerges, splitting the population. Selection factors then cause adaptation, changing traits. Eventually, the populations can no longer interbreed, resulting in allopatric speciation.

Answer:

1. One population of organisms exist
2. A geographic barrier emerges
3. Original population is split
4. Selection factors cause both populations to adapt to their new environments
5. The traits in each population change
6. Members of each population are no longer able to reproduce fertile offspring
7. Allopatric Speciation