Question

what type of isolation exists when the reproductive organs of two different species dont physically fit together?
mechanical isolation
temporal isolation
geographic isolation

Explanation:

Mechanical isolation is a pre - zygotic reproductive barrier. It occurs when the reproductive organs (such as genitalia in animals) of two different species are structurally incompatible. This physical mismatch prevents successful mating and fertilization. Temporal isolation is related to differences in the timing of reproductive events (e.g., different mating seasons). Geographic isolation is about physical separation of populations (e.g., by mountains or rivers). Since the question is about the physical fit of reproductive organs, mechanical isolation is the correct answer.

Answer:

mechanical isolation