Answer:
Mutation in one exon: 1 amino acid will be replaced by another one; variable consequences depending on the amino acid: most of the time a silent mutation; but the Sickle-cell anemia is due to a mutation at the 6th codon of the β gene (Glu->Val).
Explanation:
i googeld it
It performs all functions for the organisms
i think bubbles tbh
Explanation: oxygen, carbon dioxide and hydrogen produces bubbles