Genetic variation allows for mutations to occurs where survival of the fittest occurs. This makes sure that the most adapted creatures survive and are able to pass their genes on to offspring. Thus causing evolution.
        
             
        
        
        
Which of what? What’s the rest
        
             
        
        
        
Out of the choices given, the example of an eukaryote is yeast. The correct answer will be C. 
        
                    
             
        
        
        
Answer:
B.
burning of fossil fuels
it increase the amount of carbon present in atmosphere. 
 
        
                    
             
        
        
        
 Answer:
I think its bone, air and hence
Explanation: