I believe the answer is B. Hope I help! Sorry if not. ):)
        
                    
             
        
        
        
An electron transport chain (ETC) is a series of complexes that transfer electrons from electrondonors to electron acceptors via redox (both reduction and oxidation occurring simultaneously) reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.
        
             
        
        
        
I take biology 1 just not FLVS. whats Ur question?
 
        
             
        
        
        
Charles Darwin is considered the father of modern biology, as he influenced more people than any other biologist. Also, evolution by natural selection is the most important part of biology.
        
             
        
        
        
Answer:
Aquaspirillum bengal has helical shape and its deoxyribonucleic acid base composition is 51% mol guanine and cytosine.