The three components of a scientific argument are Scientific Idea, Expectation and Observation. The Scientific idea generate expectation,  expectations results to observation and the last is relevant to those expectations form what we call scientific argument.
        
                    
             
        
        
        
Answer:
I guess it is C.
Explanation:
Because a gene is the basic unit of heredity that determines a offspring's characteristic, my guess is that the answer is C
(Hope this helped!)
 
        
             
        
        
        
Panda's population and the animals that have risk of extinction. Dolphins, Whale, Shark and many more
        
             
        
        
        
"Testes and Ovaries"
Two hormones are primarily responsible for pubic hair during puberty. Androgen and Estrogen, of which are spectively provided by the "Testes and Ovaries". Pubic hair is the bodies attempt of protecting those organs against friction with contact of skin.
        
                    
             
        
        
        
Inheritance of Traits by Offspring Follows Predictable Rules. Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism.