Adaptations for Aquatic and Aerial Movement · NCERT Biology

Which skeletal feature is common to both aquatic and aerial vertebrates for efficient movement?

  1. A rigid axial skeleton throughout the body
  2. A flexible vertebral column for efficient motion
  3. Complete absence of ribs and thoracic cage
  4. Presence of a heavy, reinforced skull
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Correct answer: A flexible vertebral column for efficient motion

A flexible vertebral column allows both swimmers and fliers to generate powerful undulations and body curves. It provides the range of motion needed for efficient thrust and maneuverability.

Difficulty: Medium Question 37 of 40

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