Question

Internal adaptations are the traits created by an evolutionary process whereby a population becomes better suited to its habitat by adapting the function of its internal structures. What is an internal adaptation birds have that makes them well suited for flight? A) Beak B) Hollow bones C) Smooth feathers D) Crop and gizzard

Answer 1

B) Hollow bone

Step-by-step explanation:

Air sacs are attached to the hollow areas in a bird's bones. Essentially, their lungs extend throughout their bones. This helps birds take in oxygen while both inhaling and exhaling. This adds more oxygen to the blood, providing a bird with extra energy for flight.