The density of a large piece of iron and a small piece of iron will be the same because A. Density is the same for all objects
B. Density is independent of object size
C. Density is a mathematical equation
D. The smaller piece fits inside the larger piece

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.