Answer:
The correct answer will be option-pollen.
Explanation:
The pollen are the male gametophyte which is produced in the seed plants.
The pollen produce male gametes after entering the female gametophyte. The male gametes fuse with the egg cell and form the embryo inside ovary which matures and forms seeds.  The vascular seed plants lack these pollen but instead produces male gametes in gametangia which are replaced by the pollen in the seed plants.
Thus, option-pollen is the correct answer.
 
        
             
        
        
        
Answer:
Answer is A.
Explanation:
H2O, meaning 2 hydrogen and 1 oxygen. This is the recipe for water basically.
 
        
             
        
        
        
If you choices are the following;
a. use and store O2.
b. use and make ATP.
c. store energy in glucose.
d. release energy from glucose.
The answer would be b. use and make ATP.
Both processes use and make ATP but the way they do this are reversed. In cellular respiration, ATP is made by breaking down complex molecules. Photosynthesis on the other hand uses ATP to produce complex molecules. 
 
        
                    
             
        
        
        
The example of the principle of the separation of powers is all of the choices given here. So the correct answer is D, all of the above.