What are hedgehog quills made of?
A Keratin
B Bone
C Cartilage
Hedgehog quills are made primarily of keratin, the same protein that makes up human hair and nails, as well as the hooves, horns and feathers of other animals. When a hedgehog feels threatened, it contracts its muscles, causing the quills to stand erect and create a protective barrier against potential predators. The quills are not released or thrown as a means of defence, as is sometimes incorrectly portrayed.
The correct answer is Keratin.