[Campbell Biology P.557] Two closely related species of cicadas coexist in the same geograph... | Practice Question

Two closely related species of cicadas coexist in the same geographic region, but one species emerges for mating in early summer, while the other emerges in late summer. This difference prevents interbreeding between the two species. What type of prezygotic reproductive barrier does this scenario best illustrate?

  • A: Habitat Isolation
  • B: Temporal Isolation
  • C: Behavioral Isolation
  • D: Mechanical Isolation

Explanation

Temporal isolation occurs when species that breed during different times of the day, different seasons, or different years cannot mix their gametes. The cicadas emerging at different times of the summer perfectly exemplify this type of barrier.