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.

Answers distribution

bones
keratin
chitin
cartilage
answers
flagthe United Arab Emirates
5%
85%
5%
5%
20
flagSpain
0%
78%
21%
0%
14
flagSingapore
7%
76%
7%
7%
13
flagMalaysia
13%
73%
6%
6%
15
flagIndia
3%
65%
19%
11%
208
flagGermany
2%
65%
13%
18%
155
flagthe United Kingdom
3%
64%
16%
15%
308
flagFrance
7%
64%
17%
10%
28
flagAustralia
9%
63%
18%
4%
22
flagCanada
9%
62%
9%
18%
32
flagItaly
0%
62%
25%
12%
16
flagUkraine
6%
60%
20%
13%
30
flagPoland
4%
59%
21%
14%
12173
flagPakistan
2%
56%
27%
13%
37
flagthe United States
4%
55%
19%
18%
470
flagRepublic of Ireland
2%
55%
25%
17%
47
flagthe Netherlands
3%
55%
33%
7%
27
flagUnknown
3%
51%
27%
17%
311
flagthe Philippines
6%
48%
27%
18%
33
flagNorway
12%
37%
31%
18%
16

Gender

men54%
women54%
bones
4%
3%
keratin
54%
54%
chitin
24%
26%
cartilage
17%
15%

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Author: globalquiz.org
Illustration: Daniel Wehner
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