Answer:
D. oxygen is the final electron acceptor.
Explanation:
Oxygen serves as the final electron acceptor in aerobic cellular respiration. The whole pathway includes glycolysis, Kreb's cycle, and oxidative phosphorylation.
Oxidation of NADH and FADH2 formed during glycolysis and Kreb's cycle through electron transport chain during oxidative phosphorylation includes molecular oxygen as the terminal electron acceptor.
The proton motive force generated during the electron transfer from NADH and FADH2 to oxygen gas drives phosphorylation of a large number of ADPs into ATPs.  
 
        
             
        
        
        
Answer:
D to produce energy-carrier molecules 
Explanation:
The main function of the Krebs cycle is to produce electron carriers that can be used in the last step of cellular respiration.
 
        
             
        
        
        
Answer:
The answer is B.
Explanation:
It is a organ of our body! 
I hope this helps~!
 
        
                    
             
        
        
        

The designation Rr for a pea-plant's peas shows that the plant is a <u>true-breeding plant</u>.
 
        
             
        
        
        
Answer:
An understanding of biology can help you make choices and decisions that affect your health. Biologists and other scientists research environmental issues such as pollution, biodiversity,land conservation, and natural resource use. 
Explanation:
Hope this helped Mark BRAINLIEST!!!