Answer: For decreased chances of rejection 
Explanation: 
The three higly polymorphic MHC 1 genes in human beings are HLA-A, HLA-B and HLA-C.
These determine the compatibility of the organ or tissue in the recipient's body each by the help of many alleles that segregates in a population.
There are very less chances that a random chosen donor will match the a recipient six allele genotype.
This is the reason parent  may be the best donor for organ transplantation or tissue transplantation.
 
        
             
        
        
        
<span>Helium nuclei have a positive charge of 2+ when observed. Compared to a hydrogen nuclei, we can see that the Helium nuclei is more difficult to fuse as it has a greater charge than Hydrogen 1+. This chemical difference makes the answer true.</span>
        
             
        
        
        
It is either 1 or 2 but I think it is temp(2)
        
                    
             
        
        
        
As the world evolves, there is a change in the ecosystem, and with that comes the fluctuation. Organisms have have changing populations as they adapt, slowly die out, or thrive in the new ecosystem.