I guess it is one ofA or C
        
                    
             
        
        
        
Answer:
Hard
Explanation:
it is hard because these are usually hard parts of an organism including shells, bones, teeth, woody trunk, stems, and branches.
 
        
             
        
        
        
 It contain oxygen atom calculated below
<span>6.35gC x 2.00gO/1.50gC
 = 8.47g O 
</span><span>  The law is that a sample of a pure substance is the same as any other sample of the pure substance no matter what the source is
</span>hope it helps
        
                    
             
        
        
        
Answer:
The stop codon mutation in Lucy's ADA gene stopped her ADA protein from working by putting a hault to the process of translation. 
Explanation:
This stopped it from working because it lead to a protein that was then nonfunctional.