What happens with the individuals when geographic variation occurs among the members of a species?
A) They may be mistaken for separate species. B) They cannot mate successfully. C) They cannot produce offspring with intermediate characteristics. D) They may be from different subpopulations.
Which of the following combinations represent prezygotic mechanisms of isolation?
A) hybrid breakdown and temporal isolation B) mechanical and temporal isolation C) hybrid sterility and temporal isolation D) hybrid breakdown and gametic isolation