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

Q: Eyespots do the cells in the front of a volvox typically develop to help swim towards light.

A: What do the cells in the front of a volvox typically develop to help swim towards light?
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Q: Producers in an ecosystem generally get their energy from the sun.

A: Where do producers in an ecosystem generally get their energy from?
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Q: Nitrogen increases protein production in plants best explains the importance of nitrogen in the cycling of energy and matter.

A:
Which best explains the importance of nitrogen in the cycling of energy and matter?
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