Albert's squirrel and the Kaibab squirrel are distinct subspecies that live on opposite sides of the Grand Canyon. They were once one species, but now differ significantly, including fur coloring.
a. geographic isolation b. behavioral isolation c. temporal isolation
Of the seven species of cicada, (Cicadae), three follow a 17-year mating cycle, while four follow a 13-year cycle. In regions where their geographic range overlaps, their emergence coincides once in every 221 years. This last happened in North America in 2015 and will not occur again until the year 2236.
a. geographic isolation b. behavioral isolation c. temporal isolation
