D. Photosynthesis only takes place in the light, while cellular respiration takes place in the light and dark.
        
                    
             
        
        
        
Answer:
The correct answer is A. The cartilaginous structure between the "throat" and the trachea is the larynx.
Explanation:
The larynx is a tubular organ. The larynx wall is composed of 9 pieces of cartilage. Three are odd (thyroid cartilage, epiglottis and cricoid cartilage), and three pairs (arytenoid, cuneiform and corniculate cartilage). In addition, it communicates the pharynx with the trachea and is in front of it.
 
        
             
        
        
        
The answer to this would be D: physical components of the environment, such as rocks and sand. The word "biotic" mean all the living organisms within an ecosystem such as plants and animals.
 
        
                    
             
        
        
        
The correct answer is D: stable and not growing or shrinking. I hope this helped:)
        
             
        
        
        
The DNA replicates it’s information in a process involving many enzymes. The DNA code for production of messenger is RNA. I’m eukaryotic cells, the MRNA is processed and migrates from the nucleus to the cytoplasm. 
Hope this helps!! ;)) 
Have a grat day!! <3