Given a scientific passage and an answer, generate a question for the given answer.

[EX Q]: Passage: Modern reptiles live in many different habitats. They can be found on every continent except Antarctica. Answer: reptiles
[EX A]: Modern members of what broad animal group live in many different habitats and are found on every continent except antarctica?

[EX Q]: Passage: The most noticeable magnetic activity of the Sun is the appearance of sunspots. Sunspots are cooler, darker areas on the Sun's surface ( Figure below ). Sunspots occur in an 11-year cycle. The number of sunspots begins at a minimum. The number gradually increases to the maximum. Then the number returns to a minimum again. Answer: 11
[EX A]: What is the year cycle that sunspots occur?

[EX Q]: Passage: Which of the three domains of life do viruses belong to? None. Why? Viruses are usually considered to be nonliving. Viruses do not meet most of the criteria of life. They are not even made of cells. Answer: they are nonliving
[EX A]:
Why do viruses not belong to any domain of life?