Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: In pupa stage of their life cycle do insects begin developing their wings.

A: In what stage of their life cycle do insects begin developing their wings?
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Q: Negative growth rate results when birth rates fall even lower than death rates.

A: What results when birth rates fall even lower than death rates?
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Q: Producing light without a high temperature is called luminescence.

A:
Producing light without a high temperature is called?
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