You are presented with the quiz "Macroevolution above the level of the species happens over what" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "macroevolution is evolution over geologic time above the level of the species" and "dates are provided for the recognized eras and periods of geologic time". 

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


 

  eras         