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
flagIsrael
0%
90%
0%
10%
10
flagthe United Arab Emirates
7%
84%
0%
7%
13
flagSpain
0%
78%
21%
0%
14
flagSingapore
7%
76%
7%
7%
13
flagMalaysia
13%
73%
6%
6%
15
flagAustralia
12%
68%
12%
0%
16
flagGermany
3%
65%
12%
19%
125
flagthe United Kingdom
4%
64%
15%
15%
229
flagIndia
4%
64%
18%
12%
165
flagCanada
9%
63%
13%
13%
22
flagItaly
0%
63%
27%
9%
11
flagFrance
7%
61%
19%
11%
26
flagRepublic of Ireland
2%
59%
24%
13%
37
flagPoland
4%
58%
21%
15%
9127
flagthe Netherlands
4%
56%
30%
8%
23
flagthe United States
4%
55%
20%
18%
414
flagPakistan
3%
53%
30%
11%
26
flagthe Philippines
6%
50%
26%
16%
30
flagUU
6%
45%
35%
12%
31
flagNorway
7%
38%
38%
15%
13

Gender

men55%
women55%
bones
4%
3%
keratin
55%
55%
chitin
23%
25%
cartilage
16%
15%

Details

Author: globalquiz.org
Illustration: Daniel Wehner
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