Now, imagine that a population of tortoises stays in this environment with the higher-up food sources. But another population of tortoises migrates (moves to) a different environment that is covered in dome-shaped rocks. In this environment, it is an advantage to have a dome-shaped shell for camouflage, so the tortoises with the dome-shaped shells have an advantage and are not eaten as much as the tortoises with the other shell shapes. Over time, these two populations gain differences as they are exposed to different environments. The two populations of tortoises are geographically isolated- they are so far apart that they cannot reproduce with each other. Which of the following will most likely occur after many generations of being separated? - They will become separate species.
- Both populations will go extinct.
- One population will die off.
- They will come back together and interbreed.