Hemoglobin is a protein that carries oxygen through the blood. In sickle cell anemia, this protein has a sickle cell shape due to a change in a single amino acid. This is an example of the structure altering the protein's function.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

b. lithosphere, asthenosphere, mesosphere   is the answer most likely