Fact 1: Macroevolution is evolution over geologic time above the level of the species.

Fact 2: Geologists break time down into geologic time units called eras .

Given the two facts above, answer the question "When does macroevolution over eras occur?" with the following options: 
- relocation
 - colder and wetter
 - in a few years
 - permineralization
 - over eras of time
 - within a lifetime
 - Continents drifting
 - in minutes


 

     over eras of time    