Which of the following are importannt in controlling the concentration of body water and electrolytes? A. Liver
B. Kidney
C. Lungs
D. Heart

Kidneys maintain the electrolyte concentrations by filtering the electrolytes and water from blood, returning some to the blood, and excrete Cretingham any excess into the urine

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.