The cell wall of a plant is made of cellulose, the exoskeleton of an insect is made of chitin, and corn is composed of starch molecules. What is the best argument to support the claim that cellulose, chitin, and starch are made from the same elements? 1)The nucleic acids used in the production of sugar during photosynthesis are linked together to form the different molecules.

2) The chemical elements used in the production of sugar during photosynthesis are linked together to form the different molecules.

3) The oxygen used in the production of sugar during photosynthesis are linked together to form the different molecules.

4) The carbon dioxide used in the production of sugar during photosynthesis are linked together to form the different molecules.