Which of the following best explains how the structures of chitin and cellulose make them hard to digest?
a. they both have branching chains of glucose molecules, but cellulose can be digested and chitin cannot.

b. they both have an alternating arrangement of glucose molecules, but only chitin has the ability to store glucose.

c. they both have branching chains of glucose molecules, but only cellulose provides structure and support to the organism.

d. they both have an alternating arrangement of glucose molecules, but cellulose has hydrogen bonds while chitin has amino group bonds.

is it a., c., or neither, lol.

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.