Question

which statement best explains why organisms of the same species that become isolated eventually become different from each other over time?
they do not have any of the same genes.
their dna mutates.
they both find ways to survive.
they are exposed to different environments.

Explanation:

When organisms of the same species become isolated, they are exposed to different environments. Over time, natural selection acts on these populations. Different environmental pressures (such as food availability, predators, climate) favor different traits. For example, in one environment, a trait that helps in camouflage might be selected for, while in another, a trait for better heat tolerance might be favored. As a result, the gene pools of the two populations diverge. Mutations also occur independently in each population, adding to the genetic differences. Eventually, these differences can lead to the populations becoming so distinct that they can no longer interbreed, which is the basis of speciation.

Answer:

They are exposed to different environments.