Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Prokaryotes group of simple organisms recycles nutrients and has been on earth since long before multicellular life appeared.

Answer: What group of simple organisms recycles nutrients and has been on earth since long before multicellular life appeared?


Question: Photoautotrophs and chemoautotrophs are two basic types of autotrophs.

Answer: Photoautotrophs and chemoautotrophs are two basic types of what?


Question: The pressure of a sample of gas is measured with an open-end manometer.

Answer:
The pressure of a sample of gas is measured with an open-end what?