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: Virtually all aquatic organisms depend directly or indirectly on protists for food.

Answer: Virtually all aquatic organisms depend directly or indirectly on what for food?

Question: A bow wake is created when the wave source moves faster than the wave propagation speed.

Answer: What is created when the wave source moves faster than the wave propagation speed?

Question: Divide and reproduce cells does the cell cycle do.

Answer:
What does the cell cycle do?