Both photosystems contain many pigments that help collect light energy, as well as a special pair of chlorophyll molecules in the heart (reaction center) of the photosystem. The special pair of photosystem I is called P700, while that of photosystem II is called P680.
        
             
        
        
        
6 images:
 1 2
3 4 
5 6
Interphase: image # 4
Prophase: image #6
Metaphase: #1
Anaphase: #3
Telophase: #2
Cytokinesis: #5
        
             
        
        
        
 Answer:  A new study in the journal Biotechnology for Biofuels has found that those wasted watermelons could be turned into up to 2.5 million gallons of ethanol. It turns out that watermelon juice is a great base to make ethanol from -- it's full of sugar and yeast-friendly amino acids. 
Explanation:
I hope it helps you!
 
        
             
        
        
        
I only know this so far-
4 elements 
Nitrogen (N)
Hydrogen (H)
Sulfur (S)
Oxygen (O)
        
                    
             
        
        
        
20 Amino acids is the answer