You are presented with the question "mutations may change the structure of the what of DNA?" and the following answer choices: 
- personalities
 - mutations
 - solid, liquid, gas
 - building blocks
 - gastropod shells
 - Veins and arteries.
 - hosts
 - an organism's body

Now knowing that mutations may change the structure of a chromosome or just change a single nucleotide and nucleotides are the building blocks of DNA , choose the best answer.


 

    building blocks     