Which scenario is NOT an example of a prezygotic isolating mechanism?
A) An iris blooms at a different time of the year than a daffodil.
B) A peacock puts on a different mating display than a sparrow.
C) A snail with a shell coiling in one direction cannot mate with a snail whose shell curls in the other direction.
D) A zebroid, a cross between a horse and zebra, is sterile.
E) One type of roundworm would reject the sperm from another species of roundworm.

Question

Quizplus · Accepted Answer

Prezygotic isolating mechanisms prevent different species from mating or ensure that fertilization does not occur if they do mate. Choice D, the sterility of a zebroid (a hybrid of a zebra and a horse), is an example of a postzygotic isolating mechanism, which occurs after fertilization.

Which Scenario Is NOT an Example of a Prezygotic Isolating