The answer is D. That is what physics textbooks say.
        
                    
             
        
        
        
<span>Enzymes cut introns out of an mRNA strand.</span>
        
                    
             
        
        
        
Answer:
The most common elements, like carbon and nitrogen, are created in the cores of most stars, fused from lighter elements like hydrogen and helium. The heaviest elements, like iron, however, are only formed in the massive stars which end their lives in supernova explosions.
Explanation:
 
        
             
        
        
        
They have 46 chromosomes :) 
        
             
        
        
        
Answer:
A The gravity of the moon pulls the ocean, which causes the tides.
Explanation:
Well all of the other answers are just completely different. 
if the moon is invisible tides cannot be seen, but why is it at night it is called high tide. B is very odd because many surfing events happen during the day.
It is A because it contains the most context, because it is the only reliable and realistic option, because when the moon is up, and the sun is down, it causes stronger waves