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

Q: Passage: Modern reptiles live in many different habitats. They can be found on every continent except Antarctica. Answer: reptiles

A: Modern members of what broad animal group live in many different habitats and are found on every continent except antarctica?
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Q: Passage: All living things are capable of reproduction, the process by which living things give rise to offspring. Answer: reproduction

A: All living things are capable of what process whereby living things give rise to offspring?
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Q: Passage: Noctilucent clouds are the highest clouds in the atmosphere. Answer: noctilucent clouds

A:
What are the highest clouds in the atmosphere?
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