Answer:
Animal Waste and Fertilizers 
Explanation:
Animals, like humans, obtain nitrogen from consuming foods. The foods that the animals consume get digested and with time, the animals release the extra undigested foods and nutrients in forms of urine and feces. Like wise, fertilizers are typically made with animal waste.
 
        
             
        
        
        
Answer:
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living things. All known cellular life and some viruses contain DNA. The main role of DNA in the cell is the long-term storage of information.
Explanation:
-Eijiro <3
 
        
                    
             
        
        
        
Answer:
is about 4.6 billion years old
 
        
             
        
        
        
Answer:
She places one pot in a sunny window, one under normal classroom lights, and one in a dark room.
Explanation:
An independent variable is the only thing that changes in a proper experiment. 
 
        
             
        
        
        
I've looked us up ever since you posted it the only thing I can come up with is letter A because it talks a lot about Mountain chains that talks a lot about the ocean floor and the Hawaiian stuff so try a