Question

Which of the following characters represents flight adaption of birds?

• A. Bones are pneumatic.
• B. Sternum has keel for attachment of flight muscles.
• C. Forelimbs are modified into wings.
• D. All of the above.

Answer 1

The correct option is D All of the above.

Pneumatic bones have air spaces within them which make them lighter than more solid bone. They are only found in the skull.

The breastbone or sternum is one of the largest bones of a bird's skeleton and is part of pectoral girdle which is used for attachment of flight muscles.

Forelimbs of birds are modified into wings that help them to fly. These wings exert a downward force that helps the birds to lift up.

All of the above are the adaptation by birds which helps them in flight. Hence, option D is correct.