Which of the following components of a tossed salad will pass through the human digestive tract and be digested the least?
* cellulose (in the lettuce)
* starch (in the croutons)
* protein (in the bacon bits)
* sugar (in the dressing)
* oil (in the dressing)

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.