You are presented with the question "Cells have multiple repair mechanisms to fix what?" and the following answer choices: 
- scarce resources
 - harmful substances
 - damage in DNA
 - critical organs
 - the skin
 - Veins and arteries.
 - layers of fat
 - heat or cold

Now knowing that cells have multiple repair mechanisms to fix mutations in DNA and dNA damage is called mutation, choose the best answer.


 

   damage in DNA      