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bulgar [2K]
4 years ago
12

Help please and can someone explain it me please

Biology
2 answers:
ArbitrLikvidat [17]4 years ago
7 0
Protein mainly in the form of Keratin makes up 90% of the dry matter in the feathers
LiRa [457]4 years ago
4 0
Protein mainly in form of Keratin makes up 90% of the matter in the feather's.
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