The four bases in DNA are: adenine, thymine, cytosine, guanine.
In RNA, thymine gets replaced by uracil. 
Purine is only a name for the two bases guanine and adenine. 
        
             
        
        
        
Answer:
3 atoms of S and 2 atoms of Al
  
        
                    
             
        
        
        
Answer:
The term "epoch" is normally used to define a specific era or period of time in one person's life, which is typically noted by specific important or memorable events.
Explanation:
 
        
             
        
        
        
Answer:
The logistic population growth happens as the growth rate declines as the population exceeds the carrying power. The highest number of people in a community that the ecosystem can sustain is carrying capacity.
Explanation: