You are presented with the question "Changes in what are essential for evolution to occur." and the following answer choices: 
- color of leaves
 - genetic material
 - learned behavior
 - synthetic material
 - the body's largest organ
 - acquired characteristics
 - sensory neurons
 - Most plants

Now knowing that mutations are essential for evolution to occur and mutations are changes in the genetic material, choose the best answer.


 

  genetic material       