How does your protein support the cross- concept of structure and function? If there was a mutation in the DNA that altered several of the amino acids in your protein structure, how would that alter the structure and function of the protein? Why might that be good or bad for the organism?

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.