What are hedgehog's spines made of?
bones
keratin
chitin
cartilage
Keratin is a fibrous protein, a key structural component of the hair, nails, horns, claws and hooves of mammals. Hedgehog spines are hollow hairs made stiff with keratin.
reach: rather globalanimalsbiologyhedgehogsmammalsnature
Answers by country
bones
keratin
chitin
cartilage
answers
Greece39
Australia89
Malaysia41
Republic of Ireland40
the United Kingdom340
Germany634
Switzerland62
the United States722
India718
Kazakhstan112
Austria121
Uzbekistan34
Poland17329
Belarus100
Pakistan81
Ukraine571
Russia446
Nigeria51
Canada62
the Philippines76