Adaptations for Aquatic and Aerial Movement · NCERT Biology

The presence of a keel on the sternum in birds is associated with:

  1. Balance during walking
  2. Attachment of powerful flight muscles
  3. Protection of heart and lungs
  4. Reduction of body weight
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Correct answer: Attachment of powerful flight muscles

The keel provides a large surface area for attachment of strong pectoral muscles. These muscles are essential for wing movement during flight.

Difficulty: Medium Question 24 of 40

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