Which of the following features represents an | vedclass

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(D) Birds exhibit several adaptations for flight:$1$. Pneumatic bones: Their bones are hollow and air-filled,which reduces body weight.$2$. Keeled ste

Vedclass · Accepted Answer

All of the above.

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(D) Birds exhibit several adaptations for flight:$1$. Pneumatic bones: Their bones are hollow and air-filled,which reduces body weight.$2$. Keeled sternum: The sternum (breastbone) is modified into a boat-shaped structure with a keel to provide a large surface area for the attachment of powerful flight muscles.$3$. Forelimbs: The forelimbs are modified into wings to provide lift and propulsion during flight.Since all these features are correct adaptations for flight,the correct option is $D$.

Which of the following features represents an adaptation for flight in birds?

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