D is ans becauseit convert 
Explanation:
convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates. 
 
        
             
        
        
        
Folds, wrinkles, etc! 
by folding the membrane of an organelle, surface area is optimized while volume remains the same. that is why mitochondria looks folded on the inside when you see pictures of it. the higher the surface area to volume ratio, the more efficient the organelle.
        
             
        
        
        
Answer: Atoms are the basic building blocks of all matter, living and nonliving. They are made up of subatomic particles (neutrons, protons, and electrons)
Explanation:
Hope thats correct and helps! :)