The correct answer is proteins. 
The oxidative phosphorylation in the eukaryotes takes place within the mitochondria with the help of electron transport chain. The main objective of the electron transport chain is to accumulate enough amount of protons in the intermembrane space so that there will be a concentration gradient which would help in the production of ATP.  
The electron transport chain comprises of various molecules, but majorly the proteins, which are situated in the inner membrane of the mitochondria.  
 
        
             
        
        
        
The answers is the symptoms can change with age
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<span>False
 Asphalt is still considered a fossil fuel, as anything that is a made up of hydrocarbons that is created from ancient biological origin is defined as such. They are not used for any sort of resource extraction due to their preserved status for study, but would still classify under the definition.</span>
        
                    
             
        
        
        
Answer: Soil is the earthworm's habitat.
Explanation: The worm gets the food from the soil and also lives in to soil, that is the basic living needs for a habitat.