Match the event with the most appropriate term. Different species of shrimp evolved on either side of the Isthmus of Panama. A flowering plant produces a polyploid cell that can self-fertilize and produce a new species. A fish species persists for millions of years with little change. Long eye-stalks is a selective trait for male stock-eyed flies by enhancing their sexual attractiveness. During an ice age, more white-coated hares appeared and less brown-coated hares remained. Two beta globin chain alleles (the HbA normal allele and the HB S sickle cell anemia allele) both circulate at high frequencies in subtropical regions where malaria is a threat. A beetle lineage rapidly diversified into several new species after the development of an adaptation for feeding on flowering plants. The shape of a hummingbird's bill and the shape of a nectar providing flower both evolved for an optimal relationship..