What are polysaccharides more difficult to digest than monosaccharides

i think the answer is a.keratin is the pigment responsible for skin color.

1) a

2)c

3)a

4)c

5)b

hope this , if so, your appreciation would be signified through giving   me brainliest, and a you : ) have any further questions? feel   free to ask me in the questions box.

answer///blank(1) increased blank(2) significantly;