12. What are the characteristic features of birds?
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Answered by
17
Explanation:
they can fly.
they have feathers
Answered by
3
Answer:
Birds are a group of warm-blooded vertebrates constituting the class Aves, characterized by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
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