Hyaluronic acid, <span>also called </span>hyaluronan.
C.
It is d, becuase you divide 500 by 15, and that is the closest answer
Heterotrophs, primary consumers, and herbivores..
Answer: In an ionic bond the valence electrons are transferred from the metal only to the neighboring nonmetal, but in metallic bonding the valence electrons of each atom/ion are free to move or float around within the entire metal solid.
Explanation:
Hormones -- such as melatonin and cortisol; the former signals the body to go to bed, while the latter signals for the sleeping person to wake up -- are created by physiological changes.
