Question

OF WHICH SUBSTANCE IS RHINOCEROS 'S HORN MADE OF?

Answer 1

keratin protein which is also found in the formation of hair

Answer 2

Answer:

keratin

These animals face extinction in part because of the world's longstanding lust for their horn, which has been valued for centuries as a carving material and medicinal. Rhino horn is made up primarily of keratin – a protein found in hair, fingernails, and animal hooves.