I think that’s substitution
I think its B if I'm not correct I'm sorry
And get a A+ on the assessment :D
So they can breatheso they can breatheso they can breathe<span>so they can breathe
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I think the correct answer from the choices listed above is option B. Keratin is the protein in mammals which shows only a primary and secondary structure. Keratin is a fibrous protein forming the structural constituent of hair, feathers, hoofs, claws and many others.
Answer: How timothys parents were different races and it made him greek and jewish.
Explanation: Timothy came from a mixed racial background, in which his mother was Jewish and his father was Greek;