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I believe the answer is c. because of Darwin's theory of evolution..
Answer: 20 amino acids
Explanation: The 20 amino acids that are found within proteins convey a vast array of chemical versatility. The precise amino acid content, and the sequence of those amino acids, of a specific protein, is determined by the sequence of the bases in the gene that encodes that protein.
That would be the ribosome
Ribosomes are tiny particles that carries RNA molecules.