Plants converts solar energy into chemical energy through the process of photosynthesis . The electron and proton from the water molecules are used to produce energy transport molecules i.e ATP and NADPH,  in the light reaction phase of photosynthesis. The energy of the sun excites the chlorophyll molecule which in turn release high energy electron. The energy of ATP and NADPH is further used to fix the carbon in the Kelvin cycle.
 
        
                    
             
        
        
        
The answer is homologous chromosomes.
        
             
        
        
        
The repeats which occur together on a chromosome are referred to as VNTR. The length of each repeat is 60bp. 
The first primer is 20bp and is 53 bp away from 1st repeat. Therefore, the total length of sequence amplified by the first primer till 1st repeat = 20+53 = 73bp. Beyond this point 6 repeats on 60 bp are present, hence, the length becomes = 73 + (60X6) = 433bp. 
Now the reverse primer which is 21bp in length is located 28bp from the repeat on its side. Reverse primer comes from the opposite direction, so it must be present after the 6 repeats. 
The total length of the amplified region = 433 + 28 + 21 = 482 bp.
 
        
             
        
        
        
Hydrogen and oxygen cells combine explosively combine.-answers.com
  
I found this online. on answers.com so I do not own credit.
        
                    
             
        
        
        
The answer could possibly be natural selection or survival of the fittest