You are presented with the quiz "What are the ova and spermatozoa of plants?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "pollen consists of tiny grains that are the male gametes of plants" and "examples of gametes are ova and spermatozoa". 

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


 

   Pollen grains        