You are presented with the question "What may change the structure of a nucleotide?" and the following answer choices: 
- oxidation reaction
 - adding heat
 - Water
 - Name
 - Mutagenic chemicals
 - permineralization
 - Air
 - that material's properties

Now knowing that mutations may change the structure of a chromosome or just change a single nucleotide and mutagenic chemicals cause mutations, choose the best answer.


 

     Mutagenic chemicals    