Problem: Two twin brothers had very different blood pressures. Tom had very high blood pressure, while Dan had low blood pressure. Which brother has to make many diet changes?

A: Tom

Problem: Two coworkers are sitting in the large break room eating lunch and watching the news on TV when they see an advertisement for glasses. John, upon seeing the ad, comments that he really should go and get a new pair since he is nearsighted and hasn't gotten a new pair of glasses in a couple years. Rick says he is glad that he doesn't need to wear glasses because it seems like such a pain to have to always have something on your face. John nods in agreement and then both men turn to see a woman at the other side of the break room waving at them and trying to get their attention. Is John more or less likely than Rick to correctly identify the woman?

A: less

Problem: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature. Which sister heard fewer frog calls during the night?

A: Julie

Problem: Ken is a microbiologist. He got two samples of yeasts, yeast A and yeast B, from two different businesses. Yeast A is used in a bakery, and yeast B is used in a brewery. He has to decide the characteristics of each yeast sample for further study. Interestingly, despite all his curiosity, Ken doesn't like any yeast to be around him. Would yeast B be used as a leavening agent or not be used as a leavening agent?

A:
not be used as a leavening agent