They both are constituents of DNA.
Adenine, cytosine, guanine and thymine are the glue that holds together the two sugar-phosphate strands which form the back-bone of DNA. The order in which these bases occur is what stores the information in DNA.
        
             
        
        
        
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density
        
                    
             
        
        
        
A antigens, B antigens, and Rh
        
                    
             
        
        
        
Answer:
<h3>The micro-organisms which convert the dead plants and animals to humus are known as decomposers.</h3>
<h3> Examples: Fungi and Bacteria. Decomposers recycle and convert the dead matter into humus which mixes with forest soil and provides necessary nutrients to plants.</h3>
 
        
                    
             
        
        
        
The answer is either the second one or the fourth one.