You are presented with the quiz "what do biologists use a microscope to see by making them appear bigger?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "microscope is used to see small things by biologists by making them appear bigger" and "bioaerosols are extremely small living organisms or fragments of living things suspended in the air". 

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


 

    bioaerosols       