Macroevolution is evolution over geologic time above the level of the species, and geologic time lines are expressed in geologic eras and periods. Given these facts, macroevolution is evolution over what, above the level of the species among the following options:
- plants
 - H 2 O
 - years
 - scale
 - gravity
 - eras
 - weathering
 - Joules


 

      eras   