Which of the following is a characteristic fe | vedclass

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(D) The class $Aves$ (birds) is characterized by several unique features:$1$. The presence of feathers and a beak (jaws modified into a beak without t

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All of the above

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(D) The class $Aves$ (birds) is characterized by several unique features:$1$. The presence of feathers and a beak (jaws modified into a beak without teeth).$2$. They are oviparous,meaning they lay eggs.$3$. They possess air sacs connected to the lungs,which supplement respiration and reduce body weight for flight.Therefore,all the given options are characteristic features of $Aves$.

Which of the following is a characteristic feature of the class $Aves$?

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