46 chromosomes in a human cell. 
Chromosomes consist of genes made of DNA.
        
             
        
        
        
Answer:
the key to an enzymes function is the speed 
Explanation:
 
        
             
        
        
        
No it is not . Explanation fossil fuels are not elements
        
                    
             
        
        
        
Earths lithospere is solid and sits on top of the softer asthenosphere.
        
             
        
        
        
Answer: The 3rd one, answer C