Everything we have today is because of the industrial revolution
        
             
        
        
        
<span>Other mutagens act by chemically modifying the bases of DNA. For example, nitrous acid (HNO2) reacts with bases that contain amino groups. Adenine is oxidatively deaminated to hypoxanthine, cytosine to uracil, and guanine to xanthine. ... Uracil pairs with adenine rather than with guanine.</span><span>
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Answer:
Tropic of Cancer marks the northern edge. Tropic of Capricorn marks the southern edge.
Explanation:
good luck
 
        
                    
             
        
        
        
The first questions answer is a community.
The second questions answer is a desert.
Hope this helps.