The following options are all reproductive barriers. which one is an example of a prezygotic barrier in which the two different species do mate?
1 two crayfish species cannot interbreed because their genitalia do not engage properly with each other.
2 hybrid mules produced by mating donkeys and horses are sterile.
3 one bird species lives in wetlands, the other in dry forests; hence, they do not encounter each other.
4 two dragonfly species regularly mate, but their gametes are incompatible.