The answer is D. An irritant that because embedded in the mantle
Answer:
DNA is a dynamic and adaptable molecule. As such, the nucleotide sequences found within it are subject to change as the result of a phenomenon called mutation. Depending on how a particular mutation modifies an organism's genetic makeup, it can prove harmless, helpful, or even hurtful.
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Explanation:
Got this from DNA Is Constantly Changing through the Process of Mutation
