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Task 1. The biological paradox: time of our lives (Evolutionary…

- - - - (3) food restriction is merely a mechanistic response with no particular relevance for ageing
        
        Effect can also be non-adaptive and be nothing more than a necessary enhancement of processes for molecular recycling when food is scarce,
      - (1) food restriction for extended lifespan is direct adaptation
        
        But ageing is not a fitness advantage, since this is normally not seen in the natural or wild population (in a non-protected environment, rodents die way earlier). So this rejects the first hypothesis about food restriction as direct adaptation :warning: #
      - (2) food restriction for extended lifespan is mediated by mechanisms for evolutionary trade-off, but not directly adaptive
        
        Resources have to be allocated either to somatic maintenance and thus a slow rate of ageing, or to reproduction to produce progeny in which a lot of energy is needed. At different food levels, resources are allocated in a different way (1) high food levels: any resources above optimal level of maintenance and repair are invested in reproduction, low level: starvations, energy invested in survival medium level: increasing investment in somatic maintenance, but only if this could help in physiological priming for later fertility and if juveniles had impaired survival prospects at that time. Thus calorie restriction could be an adaptive coping strategy. :check: