Description acceptable. This process is driven primarily by abiotic forces like climate rather than biotic competition according to the court jester hypothesis. One model of this process likens it to a ring and is exemplified by Larus gulls having a range that circles the North Pole. Darwin’s finches are often cited as exhibiting a rapid degree (-5[1])of this process (-5[1])due to adaptive (10[2])radiation. (10[1]-5[3])One form of this process occurs when physical barriers block gene flow. Whether this process occurs (0[1])among isolated (10[1])populations or in one location differentiates its “allopatric” and “sympatric” mechanisms. For 10 points, name this evolutionary process of forming a new taxonomic unit (10[1])more granular than a genus. ■END■ (10[3])