Answer:
the answer is D :)
Explanation:
Active transport uses energy molecules to move particles like sodium, against their concentration gradients, from areas of low concentration to areas of high concentration.
<span>dentinoenamel junction</span>
Plants, Fungi, and <span>Prokaryotes</span>
Building a polypeptide: Polymers are chains of subunits, monomers, linked together by chemical bonds. The bond between two amino acids is known as a peptide bond<span>. Two amino acids, joined together by a </span>peptide bond<span>, are known as a </span>dipeptide<span>. An amino acid polymer is known as a polypeptide.</span>
