A Hybrid Zone Is Properly Defined as ________

Multiple Choice

A hybrid zone is properly defined as ________.

A) an area where the ranges of two closely related species overlap but do not interbreed
B) an area where mating occurs between members of two closely related species, producing viable offspring
C) a zone where sterile hybrids form, kept separate by postzygotic barriers
D) an area where members of two closely related species intermingle, but gene flow is prevented by prezygotic barriers