Problem: Jennifer and Justin are examining the principle of chemical equilibrium in their second year organic chemistry course. They are performing a reaction that involves hydrogen gas and glucose as the starting reactants, and the products formed in the reaction are carbon dioxide and oxygen gas. Jennifer and Justin add the materials, and then wait until the reaction has reached equilibrium. Afterwards, Jennifer removes glucose from her reaction mixture, while Justin removes carbon dioxide from his reaction mixture. Which person's reaction, Jennifer's or Justin's, will begin producing less glucose?

A: Justin's

Problem: John is interested in the history of science. He went to a science museum to learn more about microscopes. First he saw a Leeuwenhoek microscope, which was labeled as item A, then he saw a compound microscope of Leeuwenhoek's time, which was labeled as item B. At the very end of his museum tour he saw a modern compound light microscope, which was labeled as item C. Which one would have fewer lenses, item A or item B?

A: item A

Problem: Jackie and Mark are two friends who are spending a day at the beach. Jackie wants to go out on the boat to spend some time on the ocean, but Mark wants to lay out on the beach and relax. Since they can't agree, Jackie goes out on the boat alone while Mark stays behind on the beach. Is the air near Mark warmer or cooler than the air near Jackie?

A: warmer

Problem: Reed started studying protozoa and was more interested in the predatorial behaviors of protozoa, while Brad wanted to know more about other types of protozoa, suck as grazers and decomposers. Which person learned more about protozoa that graze on algae?

A:
Brad