Answer:
Body water homeostasis is regulated mainly through ingested fluids, which, in turn, depends on thirst. Thirst is a sensation created by the hypothalamus, the thirst center of the human body.
Explanation:
 
        
             
        
        
        
C. Chromosomes because they are need to have the cell funtion.
        
             
        
        
        
Cells build carbohydrate polymers by using energy to form glycosidic linkages, the bonds betweenmonosaccharides. A dehydration synthesis reaction forms a bondbetween carbon atoms in twomonosaccharides, sandwiching an oxygen atom between them and releasing a water molecule.
        
             
        
        
        
<span>Since alkylating agents work to prevent the cell from replicating its genetic material, the cell would most likely stop at the interphase checkpoint, which is the phase before mitosis (which consists of prophase, metaphase, anaphase, and telophase). During interphase, the cell replicates its genetic material (DNA), but this would be prohibited by alkylating agents.</span>
        
             
        
        
        
Answer:
The initial step of producing protein in a pig kidney artificially may involve the study of number mRNA produced by kidney.
Explanation:
As the protein is produced mainly in the kidney by studying the mRNA produced in it. It shows the locations of kidney elevated proteins such as the – proximal tubules, glomeruli etc. The maximum amount of proteins is seen in the genes, present in the kidney. 
The whole system of kidney shows that the gene expression is shared mostly with the liver.  So while producing the artificial protein in pig kidney, the number of mRNA should be considered.