Problem: Two mycologists studied about mushrooms. Bert studied mycorrhizal fungi, while Vince studied saprophytic mushrooms. Which person studied more about mineral nutrient absorption from the soil?

A: Bert

Problem: Brad and Dale went to the doctor for a check up. Brad did some blood tests and found out he has very high cholesterol levels, while his partner Dale had normal cholesterol levels, and was very healthy. Brad got scared and started worrying. Which friend had more plaque on his blood vessels?

A: Brad

Problem: Two earth-like planets orbited the same star. The inhabitants of Earth I released greenhouse gases into the atmosphere. Earth II, however, was much more conscious about the environment and protected it from anthropogenic changes. Which planet caused a reduction in wildlife population?

A: Earth I

Problem: Robert and his son Michael are going to the doctor for their yearly physical. Robert is currently in the late adulthood phase of his life. Michael, on the other hand, just began adulthood and is still quite young. Both of them want to ask the doctor about their risks for future health problems. Who is less likely to develop a cardiovascular disease?

A:
Michael