You are presented with the quiz "What type of mollusk inseminate the sperm and egg internally?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "fertilization occurs when a sperm and an egg fuse" and "most cephalopods have separate sexes and fertilization is internal". 

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


 

        Cephalopod   