Answer:
D. It absorbs photons from the sun and gives energy to electrons.
The dependant variable would be the salmon, because they depend on the water and pollution levels to give a result.
Answer:
Section 3.2Primary Structure: Amino Acids Are Linked by Peptide Bonds to Form Polypeptide Chains. Proteins are linear polymers formed by linking the α-carboxyl group of one amino acid to the α-amino group of another amino acid with a peptide bond (also called an amide bond).
