Answer:The helix structure Of DNA helps prevent it from been expose and also the sugar and phoshate group that are important components of nucleotides forms a backbone on the helix structure or the polynucleotide this back bone is hydrophobic i.e water loving hence wouldn't allow for penetration for water. 
2. Hydrogen bond is formed between this bases to keep them in place.
Explanation:
 
        
             
        
        
        
Answer:
Connective tissue adipose, cartilage, bone. 
Epithelial epidermis, the outermost layer of the skin. 
Muscle  skeletal, cardiac, and smooth. 
Nervous neurons and neuroglia
 
        
             
        
        
        
Yes, It is so strong enough that it can effect an Hillside.
        
                    
             
        
        
        
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I do indeed know what you are talking about, and your answer is no..... You cannot save him.... But, you can prolong his life. There are these pills that we gave to my dog when she was severely ill that made her live a few more months. I am so sorry about your situation. If you need any emotional support, I am here for you.
 
        
                    
             
        
        
        
The growth rings of a tree is the physical reality of the age of the tree and by examination can confirm the history behind a tree. By studying the rings you can find info about previous climate using the proper process that science says.