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Question
Which of the following is a characteristic feature of birds?
Which of the following is a characteristic feature of birds?
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Solution
The correct option is D Pneumatic bones
The bones of birds are lighter in weight than those of mammals. Some of the bones are hollow and actually act as part of the avian respiratory system. These bones are called as pneumatic bones and it includes the skull, humerus, clavicle, keel, pelvic girdle and lumbar and sacral vertebrae. Hence, option B is correct.
The bones of birds are lighter in weight than those of mammals. Some of the bones are hollow and actually act as part of the avian respiratory system. These bones are called as pneumatic bones and it includes the skull, humerus, clavicle, keel, pelvic girdle and lumbar and sacral vertebrae. Hence, option B is correct.
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