You are presented with the question "Evolution is a change in the genetic traits of living things over what?" and the following answer choices: 
- universes
 - HIV
 - long
 - extinct organisms
 - dead things
 - time
 - H 2 O
 - years

Now knowing that evolution is a change in the characteristics of living things over time and almost all physical characteristics are genetic traits, inherited from parents, choose the best answer.


 

      time   