27 Q 5
Explain how a bird's wing is designed to provide lift. What design features help to prevent stalling at low flight speeds?
Lift is provided by feathers in the more medial part of the wing associated with the forearm. The wing is streamlined in cross section, with a tightly concave lower surface, and with small, tight-fitting feathers where the leading edge meets the air. Air slips smoothly over the wing, creating life with minimum drag. Elliptical wings help prevent stalling during sharp turns, low-speed flight, and frequent landing and take off.
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