Question 5
Animal KingdomFor effective functioning of a bird's quill feather, hooks fit on the ridges of the
- A.vane
- B.rachis
- C.barbules
- D.barbs
Show the answer and explanation
Answer: C (barbules)
Explanation
The barbules on one side of each barb carry tiny hooks that catch on the ridged barbules of the next barb, locking the vane into a smooth surface.