Answer:
The hair is made up of 95% keratin, a fibrous, helicoidal protein (shaped like a helix) that forms part of the skin and all its appendages (body hair, nails, etc.). Keratin is synthesized by keratinocytes and is insoluble in water, thus ensuring impermeability and protection for the hair.
Explanation:
Answer:
B (The human foot has three arches, but the chimpanzee foot only has one)
Explanation:
Correct in edge 2021
These include the chemical. cellular. tissue organ. organ system and the organism level