Question

which of the following situations is most likely to result in the emergence of a new species?
a a population of squirrels live in a stable forest habitat.
b a population of birds live in a stable forest habitat.
c a population of squirrels live in an area where a large river forms and cuts through the middle of the forest.
d a population of birds live in an area where a large river forms and cuts through the middle of the forest.

Explanation:

New species arise most often when a population is geographically isolated (allopatric speciation), preventing gene flow. Birds can easily fly across a river, so their population remains connected. Squirrels cannot cross a large river, splitting their population into two separate groups that will evolve independently over time, leading to new species. Stable habitats with no isolation do not drive speciation.

Answer:

C. A population of squirrels live in an area where a large river forms and cuts through the middle of the forest.