Helsinki, Mörsky. 3.11.2005.
No mitochondria
Gradual fonctional decline
Death from ageing (degenerating process) or from other reasons:
immortality not a practical issue
Genetically programmed? no
No advantage for the species in individuals not to age
What happens after reproduction is irrelevant for the species.
Repairing damage, efficiency
Irreplaceable cells:
Cancer, cell division
Diets help to span life time in mammals and other organisms
and even yeasts.
Insuline -- growth
Stress -- food molecules broken by oxygen -- toxic by-products
Mitochondrial DNA. Only from the mother.