Answer:
Claim: The separation of the squirrels by the Grand Canyon and the Colorado River led to the formation of two unique species of squirrels.
Evidence: The Albert's squirrel population, which initially had grey fur, was divided and separated by the canyon walls and the Colorado River for a significant period of time, allowing for speciation to occur. Similarly, the Kaibab squirrel, which has black fur and a completely white fluffy tail, developed distinct characteristics in response to its new environment.
Reasoning: The separation of these two squirrel populations prevented them from interbreeding and allowed for genetic divergence to occur, leading to the development of distinct characteristics and the formation of two separate species. This demonstrates the important role that geographic isolation can play in the process of speciation.
Step-by-step explanation:
Is this okay?