Answer:
Chronic stress accelerates premature aging by shortening DNA telomeres. Each chromosome is like a DNA library with two protective caps on the end known as telomeres. As telomeres become shorter their structural integrity weakens, which causes cells to age faster and die younger.
Explanation
Answer:
your answer: effect, affected
Three They are all pretty un-important to the rest of the story. Why didn't you just google this?
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so um. where's the highlighted pronoun?
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