You are presented with the question "what is essential for evolution to occur?" and the following answer choices: 
- random changes in genes
 - that material's properties
 - cancer
 - remains of prehistoric life
 - h2o
 - Plant reproduction
 - revolutions
 - the environment

Now knowing that mutations are essential for evolution to occur and mutations Mutations are caused by random changes in genes, choose the best answer.


 

 random changes in genes        