An example of postzygotic hybrid sterility is?
a)the birth of a sterile mule for the mating of a horse and a donkey
b)the elaborate mating ritual of many bird species that them pick a fertile mate.

reproductive isolation reproductive isolation is classified as whether it?
a) occurs before or after fertilization.
b)is related to geography or anatomy

sometimes two species have ranges that overlap but have different periods of sexual activity or breeding seasons. this prezygotic barrier is called?
a) behavioral isolation. b)temporal isolation.

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.