You are presented with the quiz "if members of a species cannot what, then that species will likely become extinct?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "if all members of a species cannot produce offspring then that species will likely become extinct" and "when they mate with females, no offspring are produced". 

So, what's the best answer to the question?


 

    mate with females       