A friend of yours wonders out loud, "I wonder why we grow older?" Enlighten them by comparing and contrasting the rate-of-living, cellular, and programmed cell death theories of aging. In your discussion, be sure to describe the role of telomeres, cross-linking, and free radicals in the process.

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The Answer of A friend of yours wonders out loud, "I wonder why we grow older?" Enlighten them by comparing and contrasting the rate-of-living, cellular, and programmed cell death theories of aging. In your discussion, be sure to describe the role of telomeres, cross-linking, and free radicals in the process.

A Friend of Yours Wonders Out Loud, "I Wonder Why