the plethora of theories surrounding this phenomenon such as cellular, genetic and physiological functioning theories (e.g. Arking, 1991; Medvedev, 1981; Partridge, 1970). Ageing is often not the cause of death, other causes such as illnesses (e.g. cancer), starvation or an accident may occur even before senescent changes are displayed. We can see however, that ageing does have biological implications by comparing ageing organisms, with those who are essentially “immortal”, such as germ cells which…
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