Frog species mate at different times of the year.This is an example of which type of reproductive isolation?

Question

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Temporal isolation occurs when different species mate at different times of the year, which is the case for frog species mentioned in the question. A) Postzygotic isolation refers to barriers to successful reproduction that occur after fertilization, B) gametic isolation involves the inability of sperm from one species to fertilize eggs of another, C) behavioral isolation takes place when there is a lack of attraction between different species or when there are differences in courtship behaviors, and E) mechanical isolation occurs when differences in reproductive organs prevent successful mating.

Frog Species Mate at Different Times of the Year