You are presented with the quiz "What occurs over geologic time above the level of the species?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "macroevolution occurs over geologic time above the level of the species" and "macroevolution, speciation in particular, is a major area of interest". 

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


 

 speciation          