Answer:
Amino acids with non-polar side chains. 
Explanation:
The class of proteins that is unable to form hydrogen bonds with water are the amino acids with non- polar side chains. This class includes the amino acids 
Alanine
Valine
Leucine
Isoleucine
 Proline 
Phenylalanine
Cysteine 
 Methionine
 Tryptophan 
These are the nine proteins which are considered to be strongly hydrophobic. All these amino acids are hydrophobic in nature due to their side chains. Glycine is not added to this list as it does not have a side chain. 
 
        
             
        
        
        
Answer:
Educate society on the harmful effects and gradually replace fossil fuels with alternative renewable resources
Explanation:
 
        
             
        
        
        
I think it is A but not 100% sure. Think of an enzyme like a key unlock the lock is the protein. And to activate getting inside your car or house you have to fit the key into the lock.
        
             
        
        
        
Nitrogen and hydrogen 
N2 +3 H2 ---> 2NH3
hope that answers the question:)
        
                    
             
        
        
        
No, but we share a common ancestor.