Answer:
            RNA polymerase enzyme is responsible for the formation of mRNA from DNA template during transcription.
        
             
        
        
        
Yes. Acid rain destroys frog’s and tadpoles’ (young frogs) habitat of lakes and depletes oxygen supply in the lakes.
        
             
        
        
        
Moistens tissues especially those that belong to the eye, the nose and mouth.
Water in the body also regulates body temperature.
It transports oxygen and nutrients to the cells.
It also helps to prevent constipation.
        
             
        
        
        
Carbon dioxide is the compound in photosynthesis, I'm pretty sure
        
                    
             
        
        
        
The given blank can be filled with medulla.  
The medulla also called the medulla oblongata is the segment of the brainstem that is factually the stem, which elongates from the brain. The medulla is positioned below the pons and above the spinal cord and is a major relay intersection for information conducted to and from the spinal cord and the brain. This section of the brain is a monitoring center for circulation and respiration.