Question

Which of the following characteristics makes birds to adapt them successfully to flight?

• A. Bones are filled with air
• B. light body weight
• C. Forelimbs are modified into wings
• D. All the above

Answer 1

The correct option is D All the above

Flight adaptations in birds:

• The body is covered with feathers. Forelimbs are modified into wings for flight.
• Hindlimbs are adapted for walking, perching or swimming. The respiration is through lungs, which have air sacs.
• Bones are filled with air (pneumatic bones), which reduces the body weight.