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Physical properties that influence BMR in birds in mammals., Materials…

- - - - R = aM^b
        
        R=respiratory metabolic rate, a=normalization constant, M=mass, b=scaling exponent
    - - SA/V
        
        V=L^2
  - - - Endotherms, vertebrates, lungs, heart (Some exeptions: monotremes that lay eggs, flightless birds, etc)
    - - Birds
        
        Capable of flight, feathers, eggs, feed young foraged foods
      - Mammals
        
        Terrestrial movement, some aquatic species, fur, live birth, mammary glands to feed young
- - - - Display t-test results
- - - - Due to energy needs to incubate eggs, forage for food for their young, and flight.
    - - Places less metabolic needs on themselves per unit of body mass.