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%
82%
5%
5%
17
flagSpain
0%
78%
21%
0%
14
flagSingapore
7%
76%
7%
7%
13
flagMalaysia
13%
73%
6%
6%
15
flagAustralia
10%
68%
15%
0%
19
flagGermany
2%
67%
12%
17%
143
flagIndia
3%
66%
18%
11%
186
flagCanada
10%
65%
10%
13%
29
flagthe United Kingdom
3%
63%
16%
15%
269
flagItaly
0%
62%
25%
12%
16
flagFrance
7%
61%
19%
11%
26
flagPoland
4%
59%
21%
14%
10291
flagUkraine
14%
57%
14%
14%
14
flagRepublic of Ireland
2%
56%
28%
12%
39
flagthe United States
4%
55%
19%
18%
441
flagthe Netherlands
3%
55%
33%
7%
27
flagPakistan
3%
55%
29%
11%
27
flagthe Philippines
6%
48%
29%
16%
31
flagUnknown
4%
46%
32%
16%
62
flagNorway
14%
35%
35%
14%
14

Gender

men54%
women55%
bones
4%
3%
keratin
55%
55%
chitin
23%
25%
cartilage
16%
15%

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Author: globalquiz.org
Illustration: Daniel Wehner
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