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%
80%
20%
0%
15
flagMalaysia
13%
73%
6%
6%
15
flagIndia
3%
66%
19%
10%
223
flagGreece
0%
66%
11%
22%
18
flagFrance
7%
64%
17%
10%
28
flagItaly
0%
64%
23%
11%
17
flagthe United Kingdom
4%
63%
16%
15%
327
flagGermany
2%
63%
15%
18%
169
flagCanada
9%
62%
9%
18%
32
flagAustralia
7%
61%
19%
7%
26
flagPoland
4%
58%
21%
15%
13530
flagUkraine
6%
58%
22%
12%
31
flagthe United States
4%
56%
19%
18%
483
flagRepublic of Ireland
2%
55%
25%
17%
47
flagPakistan
2%
55%
28%
13%
38
flagthe Netherlands
3%
53%
35%
7%
28
flagUnknown
3%
50%
28%
18%
650
flagthe Philippines
5%
47%
26%
20%
34
flagNorway
10%
35%
35%
20%
20

Gender

men53%
women54%
bones
3%
3%
keratin
53%
54%
chitin
25%
25%
cartilage
17%
16%

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Details

Author: globalquiz.org
Illustration: Daniel Wehner
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