Answer:
Each has an amine group at one end, an acid group at the other, and a distinctive side chain.
Explanation:
The unique chemical structure attached to the backbone of each amino acid that differentiates one amino acid from another.
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Answer:
The extinction of any species is an irreversible loss of part of the biological richness of the Earth. Extinction can be a natural occurrence caused by an unpredictable catastrophe, chronic environmental stress, or ecological interactions such as competition, disease, or predation.
Explanation:
