You are presented with the question "macroevolution is evolution over what, above the level of the species?" and the following answer choices: 
- plants
 - H 2 O
 - years
 - scale
 - gravity
 - eras
 - weathering
 - Joules

Now knowing that macroevolution is evolution over geologic time above the level of the species and geologic time lines are expressed in geologic eras and periods, choose the best answer.


 

      eras   