Keratin is a ............. material?
It forms the basis of hair, feathers, wool, claws, nails, hooves and....?
Keratin is a p............?
It is also found in the tough ...?.... layer of skin.
Please make sure before you check answers, that spaces haven't been left before or after the words or it will mark them wrong.
Back
©2000 Teaching Treasures™ Publications