A student has written a paper about a deer population that was separated when a canyon developed between members of the group. In her paper, she showed that the two groups adapted differently and can no longer interbreed. What would be the best title for her paper?

The canyon geographically separated the deer groups, preventing them from mating with one another. Over time, they adapted differently and became unable to interbreed, resulting in new species. This process is called speciation by geographic isolation, so the best title is “Speciation by Geographic Isolation.”

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