Virus is the only organism which has only one strand
        
             
        
        
        
Answer:
Light energy (sunlight)
By autotrophs
As they make food from it
 
        
             
        
        
        
The question here is, is glucose a protein? No, it's not; it's a carbohydrate. 
So pepsin would not break it down: it would most probably not react with glucose at all, since pepsin breaks down proteins, not carbohydrates. <span />
        
                    
             
        
        
        
Answer:
cilli and flagella 
Explanation:
I think there is one more but not sure hope this helped 
(also if spelling is weird sorry I tried)