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%
83%
5%
5%
18
flagSpain
0%
78%
21%
0%
14
flagSingapore
7%
76%
7%
7%
13
flagMalaysia
13%
73%
6%
6%
15
flagGermany
2%
67%
12%
17%
148
flagIndia
3%
65%
20%
11%
195
flagAustralia
10%
65%
20%
0%
20
flagthe United Kingdom
3%
64%
17%
15%
281
flagCanada
9%
64%
9%
16%
31
flagItaly
0%
62%
25%
12%
16
flagFrance
7%
61%
19%
11%
26
flagPoland
4%
59%
21%
14%
10714
flagUkraine
8%
58%
20%
12%
24
flagPakistan
3%
56%
26%
13%
30
flagthe United States
4%
55%
19%
18%
452
flagthe Netherlands
3%
55%
33%
7%
27
flagRepublic of Ireland
2%
54%
27%
15%
44
flagUnknown
3%
51%
28%
15%
83
flagthe Philippines
6%
48%
29%
16%
31
flagNorway
13%
40%
33%
13%
15

Gender

men55%
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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