Evidence for the reptilian origin of birds is the occurrence of
A
Scales
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B
Hairs
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C
Claws
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D
Feathers
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Solution
The correct option is A Scales
The scales of birds are composed of keratin like beaks, claws, and spurs.they are found mainly on the toes and metatarsus, but may be found further up on the ankle in some birds. Most bird scales do not overlap significantly, except in the cases of kingfishers and woodpeckers.a bird has scales over its legs and has many characters including skull and skeleton that are very reptilian. Thus evidence for the reptilian origin of birds is the occurrence of scales.