Answer: reproduction, heredity, variation in fitness, variation in fitness in individuals among members of the population 
Explanation: 
 
        
                    
             
        
        
        
They drop on the ground and the wind blows them or birds pick them up and drop them or bees
        
             
        
        
        
The answer to your question should be the last option (waste products) if not i would go with the first option but im pretty sure is the last option
        
             
        
        
        
Adenine always pairs with Thymine, and Cytosine always pairs up with Guanine in DNA. When dealing with RNA, however, Uracil replaces Thymine. So in RNA, A pairs with U and C pairs with G. (just a fun fact) :)
        
             
        
        
        
Barry's antibodies are ab while Anna's antibodies are b