I think the correct answer from the choices listed above is option D. Simple diffusion is the cell transport that allows small molecules to move from an area of higher concentration to an area of lower concentration without energy being <span>required from the cell.</span>
        
                    
             
        
        
        
Answer:
The involvement of more than two genes.
Explanation:
The polygenic characteristics have many phenotypes because more than two genes governs the phenotype of individual organism. The single gene contains a pair of alleles that codes for two phenotype and two genes will code for 4 phenotype. Thus, more than two genes for example, three genes will have six phenotypes.
The skin color and height are polygenic characterstics in humans.
 
        
             
        
        
        
I think the hormone would be testosterone, it would be subjectively deemed useless in times other than procreation. I would suggest that the important hormone is the growth hormone Thank you for your question.
 
        
                    
             
        
        
        
Answer:
Regions of the digestive system can be divided into two main parts: the alimentary tract and accessory organs.
Explanation:
 
        
             
        
        
        
Is a written representation of something.