anonymous
  • anonymous
Characteristics 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. Is it C?
Biology
katieb
  • katieb
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anonymous
  • anonymous
B there aerodyanamic feathers and lightweightbones. Birds have many bones that are hollow (pneumatized) with criss-crossing struts or trusses for structural strength.
anonymous
  • anonymous
thanks!

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