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प्रश्न
Answer in detail.
List two notable characteristic of birds which is not found in any other group of animals?
उत्तर
The most notable characteristic of birds that are not found in any other group of animals is the presence of feathers. They are the only animals on earth that have a backbone as well as feathers that cover their entire body.
Also, their skeleton is light as their bones have air cavities and are hollow. They also have beaks with no teeth.
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