That would be : adenine, thymine, guanine, and cytosine.
        
             
        
        
        
 Answer: When an atom that has lost an electron comes in contact with an atom that has gained an electron, usually the the two atoms would attract each other and form a compound. This compound would be ionic since it is governed by ionic bonding.
Explanation:
 
        
             
        
        
        
<span>Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back intocarbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, incellular respiration oxygen is combined with hydrogen to form water.</span>
        
                    
             
        
        
        
Osmosis is the spontaneous net movement of solvent molecules through a semi-permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides.It may also be used to describe a physical process in which any solvent moves across a semipermeable membrane (permeable to the solvent, but not the solute) separating two solutions of different concentrations.Osmosis can be made to do work.
Osmotic pressure is defined as the external pressure required to be applied so that there is no net movement of solvent across the membrane.