Which of the following characteristics distinguishes birds from reptiles?
a. Reptiles have only one single middle ear bone, while birds have two or more.
b. The shape of their occipital condyles allows birds to rotate their heads more than reptiles can.
c. Birds are endothermic.
d. Birds and reptiles have distinctly different jaw bone morphologies.
c. Birds are endothermic.
Birds are endothermic, meaning that they can create their own body heat. They share the following characteristics with reptiles: a single middle ear bone, one occipital condyle, and jaw bone shape.
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