Answer:
The carbon cycle is nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms.
 
        
             
        
        
        
Answer:
It would be B 
Explanation:
By doing the punnet square, you get BB, BB ,Bb, Bb, of which 50% are heterozygous.
 
        
             
        
        
        
<span>In the duct system the atop testis where sperm mature from is known as the epididymis</span>
        
             
        
        
        
Answer:
It is made up of protons and neutrons
 
        
                    
             
        
        
        
MRNA it is the messenger, for it "feeds" information