Which of the following is a characteristic fe | vedclass

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(B) The characteristic feature of birds $(Aves)$ is the presence of pneumatic bones (hollow bones with air cavities). These bones help in reducing bod

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Pneumatic bones

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(B) The characteristic feature of birds $(Aves)$ is the presence of pneumatic bones (hollow bones with air cavities). These bones help in reducing body weight,which is an adaptation for flight. While birds do possess a four-chambered heart,this is also a characteristic of mammals,making pneumatic bones the more specific diagnostic feature for $Aves$.

Which of the following is a characteristic feature of birds $(Aves)$?

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