You are presented with the question "Macroevolution most likely occurs over what period of time?" and the following answer choices: 
- Summer
 - length
 - eons
 - long
 - growth
 - Earth
 - years
 - scale

Now knowing that macroevolution occurs over geologic time above the level of the species and all geologic time can be divided into two eons, choose the best answer.


 

   eons      