Abstract
A multicelular organism is a mortal. As such, a two-year-old mouse is a very old mouse indeed, Even with the best medical care, no would expect a mouse to live 5 years. In the case of man, gradual deterioration which accompanies aging appears to begm at about 30; a 100-year-old man is as rare as a 2-year-old mouse. Yet, in a strict sense, only the somatic cells of the body are mortals.
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References
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Ohno, S. (1970). Perpetuation of the Germ Line. In: Evolution by Gene Duplication. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-86659-3_2
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DOI: https://doi.org/10.1007/978-3-642-86659-3_2
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