An example of a grad-school level question?
How do plants most commonly break large rocks into smaller pieces?

I just took a test in school today. What question was I asked?

Question I was asked: A line graph is best used when the measured variable is

Random question?

Which characteristic is most common among animals living in a cold climate?

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Question generated: Students are investigating which type of fruit attracts the most fruit flies. Equally sized pieces of ripe apple, peach, and banana are placed in separate containers. The containers allow fruit flies to enter, but the fruit flies are unable to escape. The containers are placed outside on a picnic table for two days. The most reliable method for collecting data is to count the number of fruit flies

Problem: Write a question you would see in a school textbook.

Answer: Eating leafy vegetables is important for human health. This is because leafy vegetables are a good source of which of the following?

Problem: Write a question you would see in a school textbook.

Answer:
Why is protein an important part of a healthy diet?