D. Darwin's theory of natural selection shows that organisms evolve based on which one's survive the best and thrive. 
        
                    
             
        
        
        
Answer:
Mutation. A mistake made while DNA copies which causes changes in DNA 
Explanation:
 
        
                    
             
        
        
        
A condition in which the force of the blood against the artery walls is too high.
Usually hypertension is defined as blood pressure above 140/90, and is considered severe if the pressure is above 180/120.
        
             
        
        
        
Answer:
Almost twice
Explanation:
Human being have estimate 24,000 genes, while fruit flies have an estimate of 14,000 genes: meaning it is almost twice