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There are dark regions with numerous craters called impact craters and they cover one-third of the moon. The remainder of the moon is covered by lighter regions which have many ridges and grooves . The ridges are as high as 2000ft and stretch for thousands of miles.</span>
        
             
        
        
        
Answer;
-Nuclei acid 
Explanation;
-Nucleic acids are molecules that allow organisms to transfer genetic information from one generation to the next. These macromolecules store the genetic information that determines traits and makes protein synthesis possible.
-Nucleic acids include DNA and RNA. These molecules are composed of long strands of nucleotides. Nucleotides are composed of a nitrogenous base, a five-carbon sugar, and a phosphate group.
 
        
                    
             
        
        
        
Khan Academy is great! Also, Alison (it's a website) has some free courses as well.
        
                    
             
        
        
        
Answer:
I'm pretty sure it is organ
 
        
             
        
        
        
Answer:
C.Autonomic
Explanation:
Autonomic is the peripheral part of nervous system.Autonomic help to think logically.It have two parts these are parasympathetic and sympathetic nervous system.
Autonomic controls lots of activity like breathing,sweating,digestion and shivering.We know that all our body action and reaction is controlled by our brain.