Which of the following is a postzygotic isolating mechanism for two species found in the same geographical location?
A) The two species occupy different habitats.
B) The two species are active during different parts of the day.
C) The two species mate during different times of the year.
D) The two species have incompatible genitalia.
E) The two species can mate, but the offspring are sterile.

Question

Quizplus · Accepted Answer

Postzygotic isolating mechanisms refer to barriers that occur after fertilization, preventing the hybrid offspring from becoming a fertile adult. Sterility of the offspring, as mentioned in option E, is a classic example of a postzygotic barrier, ensuring that even if two species can mate, they do not produce fertile offspring, thus maintaining species boundaries.

Which of the Following Is a Postzygotic Isolating Mechanism for Two