David is an entomologist. He recently got interested in ants and their behaviors. To that end, he studied a group of ants, which be labeled as case A. To compare ants with other ant like creatures he studied another hymenopteran group, which he labeled as case B. Moreover, he noticed two distinct trails made by the ants, trail A or trail B. Trail A was followed by many ants, but trail B was abandoned by them. In which case the pheromone chemican signal would be more developed, case A or case B?
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Answer: case A

Two groups of people were part of a nutrition study that lasted 2 years. Group A had a normal diet, while group B consumed an extra 1000 calories a day for 2 years. Group B gained lots of weight. Which group had more people that may become obese?
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Answer: group B

Scientists are performing some tests on two molecules in order to try to discover how to bring dinosaurs back to life. In the first test, they increased molecule Y's speed, but they didn't do anything to molecule X's speed. They then compared the two molecules to see if they could discern anything useful. Which molecule has more kinetic energy?
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Answer:
molecule Y