Homologous
 
The fins of fishes and flipper of a whale are homologous structures since they have different structure but similar structure
 
        
                    
             
        
        
        
Answer:
attacks the outermost phosphorous group of the incoming nucleotide.  
Explanation:
Transcription is the biological process where RNA is formed. As you may already know, RNA is an extremely important nucleic acid for genetic processes and the production of proteins. The transcription has three steps that are called start, elongation and end. In the elongation phase, the RNA strand is growing, at this time, RNA polymerase, which is the enzyme responsible for RNA elaboration, places the nucleotides, in the RNA strand, in the 5' - 3' direction. This enzyme causes the hydroxyl, which makes up the nucleotide at the 3' end of the forming RNA, to attack the phosphorus present in the incoming  ribonucleotide.
 
        
             
        
        
        
The answer would be combined statistical area. This is made of metropolitan and micropolitan statistical area which would be located in the United States as well as Puerto Rico that demonstrate both economic as well as social linkage.Hope this is the right answer.
        
             
        
        
        
Eukaryotic cells have a nucleus and contains organelles.