Question

Which of the following part of the bird is modified as wings?

• A. Breast bones
• B. Forelimbs
• C. Hindlimbs
• D. All of the above

Answer 1

Answer: (B)

Forelimbs

The forelimbs of the birds resemble the forearms of the humans. The forelimbs of the birds constitute the radius and the humerus bones which are fused together. The forelimbs are modified as wings to help in their flight.

The breastbone acts as the centre for attachment of flight muscles.

The hindlimbs of birds are modified into legs needed for walking, hopping etc.

Thus, the forelimbs of the birds are modified into wings (see figure)