While you're walking your dog,you observe two snails interacting on a turf of grass.You recognize that they are two separate species.The two individuals are attempting to mate,but the direction of the turn in the shell prevents the two species from successfully mating.This is an example of:
A) Allopatric speciation
B) Novel speciation
C) A pre-zygotic barrier
D) A post-zygotic barrier

Question

Quizplus · Accepted Answer

This scenario describes a pre-zygotic barrier, which occurs before fertilization and prevents mating or successful fertilization from occurring between different species. In this case, the snails are prevented from mating due to the direction of the turn in their shells, which is a physical characteristic that distinguishes them as separate species. Allopatric and novel speciation refer to different processes by which new species can arise, but neither applies to this specific scenario. A post-zygotic barrier would occur after fertilization and prevent the development of a viable, fertile offspring, which is not the case here.

While You're Walking Your Dog,you Observe Two Snails Interacting on a Turf