Chapter 16 Self Quiz Summary

  Aging and Disease
  1. All animals experience after the age of maturity: their probability of dying increases with increasing age.
  2. One possible genetic basis for senescence is the pleiotropy model, as exhibited in some fruit flies.
  3. Disposable theory suggests that there in a tradeoff in balancing resources between traits (involved in maintenance and repair) and reproductive traits; sometimes this is affected by sex ratios.
  4. Many animals can reduce the risk of infection from by avoiding areas that have high parasite levels and also avoiding parasitized conspecifics.
  5. Some animals may engage in self- activities to reduce their exposure to parasites.
  6. Some human diets may help prevent disease; food in many tropical cultures may reduce bacterial infections.
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