Question: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas. Which researcher studied another significant long-lived greenhouse gas in Earth's atmosphere?
Answer: Ben

Question: Mike is studying for his biology exam. He found that all body cells are not equal in size - some are large and some are small. He labeled the large cells as class A cells. Then he labeled the small cells as class B cells. He is now prepared to find the differences between them. Which cell might not have microvilli as a feature, class A or class B?
Answer: class B

Question: Stephanie and Barb are two friends that belong to a sailing club. They are having a lunch at the cafe in the club and discussing their latest boat purchases. Stephanie mentions that her latest boat she has been using has cavitation. Barb takes a bite of her sandwich and remarks that the boat she is currently using doesn't have any cavitation. Whose boat will be unable to be heard from farther away?
Answer:
Barb