Patterns incidence distribution and possible control of diseases as well as other factors pertaining to health
        
             
        
        
        
I believe during the s phase
        
             
        
        
        
Answer:
D is rhe answer of rhis question. 
Explanation:
collection of cells make tissue, collection of tissues form organ, similarly group of organs combine to form a system and when these systems combine it forms a whole body of organism. 
 
        
                    
             
        
        
        
I believe your answer is E
        
             
        
        
        
Answer:
C) Primary, tertiary and quaternary levels of protein structure
Explanation:
Primary structure; Covalent bond is present in form of peptide bond in the primary structuture of proteins. The amino acids are held together in the polypeptide chain by peptide bond.
Tertiary structure; Disulfide bonds are present between cysteine amino acids, that keeps the parts of polypeptide chain strongly attached to one another.
Quaternary structure; The Quaternary structure of protein is held together by hydrophobic interaction and disulfide bonds.