What comprises an arthropod's exoskeleton? A) Keratin B) ...

[fasfsadfdsfa]

What comprises an arthropod's exoskeleton?
 A) Keratin
  B) Spicules
  C) Chitin
  D) None of these choices

Question 2

Steep sea cliffs on erosional coasts are usually caused by ____.
 A) exposure of these features due to a drop in sea level
  B) deposition of large amounts of sediment by waves
  C) glacial erosion
  D) the collapse of undercut notches of exposed bedrock

[Edwyer]

Answer to Question 1

C

Answer to Question 2

D

[fasfsadfdsfa]

Thanks for the timely response, appreciate it

[tandmlomax84]

Gracias!