It could mean that the continents that the mountains are on were once next to each other. This also proves the theory of continental drift/Pangea
 
        
             
        
        
        
Answer:
The answer is Genetic drift and natural selection. 
Explanation:
Genetic drift is a change is genetic composition that enhances organisms adaptation to an environment. The continuous change gives an extra advantage and enhances better chances of survival 
Natural selection is the process that results in the adaptation of an organism to its environment by relatively reproducing its genes. 
This two factors are the major factors that like causes allele fixation 
 
        
             
        
        
        
Answer:
I guess it is C.
Explanation:
Because a gene is the basic unit of heredity that determines a offspring's characteristic, my guess is that the answer is C
(Hope this helped!)
 
        
             
        
        
        
Any photos below 7 is known as acidic, the lower the pH the more acidic the solution I believe.