RSS FeedsCharacteristics that give birds the energy they need to fly long distances are ?
a) strong breast muscles and wings.
b) aerodynamic feathers and lightweight bones.
c) divided ventricle and air sacs in lungs.
d) endothermic metabolism and fused bones.
Don’t listen to Cee, the answer is not D). If birds had fused bones they wouldn’t be able to move, and endothermic means that their metabolic reactions would absorb heat, rather than release it.
The answer should be C) because divided ventricles increases the efficiency by which oxygen can travel throughout the body, and air sacs in the lungs (and elsewhere in the body) increase the volume of air, and therefore oxygen that can be absorbed by the body.
Although a and b are true and they certainly make flight easier and conserve energy for the bird these characteristics do not “give birds the energy” that they need.
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March 23rd, 2009
d
References :
March 23rd, 2009
Don’t listen to Cee, the answer is not D). If birds had fused bones they wouldn’t be able to move, and endothermic means that their metabolic reactions would absorb heat, rather than release it.
The answer should be C) because divided ventricles increases the efficiency by which oxygen can travel throughout the body, and air sacs in the lungs (and elsewhere in the body) increase the volume of air, and therefore oxygen that can be absorbed by the body.
Although a and b are true and they certainly make flight easier and conserve energy for the bird these characteristics do not “give birds the energy” that they need.
References :
Common sense, I suppose.