World Science Scholars
2.2 Constraints and Diversity
  • There are also mathematically describable physical constraints that explain diversity.
  • Metabolic rate refers to the amount of energy an animal uses.
  • According to physicist Geoffrey West, vascular systems in organisms scale like a fractal. Thus metabolic rate is a result of the network distribution of vessels constrained to body mass. 
  • All animals live the same amount of metabolic time. Longevity increases with decreasing metabolic rate, meaning animals who use energy more slowly tend to live longer lives.

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