You are presented with the quiz "Adult members of the Porifera phylum produce what?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "adult sponges produce eggs and sperm" and "sponges are multicellular animals that belong to the Phylum Porifera". 

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


 

      eggs and sperm     