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

Q: Passage: Thunderstorms grow where ground temperatures are extremely high. Answer: extremely high

A: Are thunderstorms more likely where the ground temperatures are extremely high or extremely low?
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Q: Passage: Secondary pollutants form from chemical reactions that occur when pollution is exposed to sunlight. Answer: sunlight

A: Secondary pollutants form from chemical reactions that occur when pollution is exposed to what?
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Q: Passage: Prokaryotic cells have a cell wall outside their plasma membrane. Answer: plasma membrane

A:
Prokaryotic cells have a cell wall located outside of the __________?
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